CN110011343B - Wide-input bidirectional power supply device - Google Patents
Wide-input bidirectional power supply device Download PDFInfo
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- CN110011343B CN110011343B CN201910270788.0A CN201910270788A CN110011343B CN 110011343 B CN110011343 B CN 110011343B CN 201910270788 A CN201910270788 A CN 201910270788A CN 110011343 B CN110011343 B CN 110011343B
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 208
- 238000004146 energy storage Methods 0.000 claims abstract description 96
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 37
- 238000010586 diagram Methods 0.000 description 36
- 238000010248 power generation Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion 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
- H02M7/79—Conversion 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
- H02M7/797—Conversion 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
Abstract
The invention relates to the technical field of power supplies and discloses a wide-input bidirectional power supply device, wherein the positive and negative ends of an energy storage battery pack are connected with an electromagnetic interference filter through a direct current breaker, the electromagnetic interference filter is connected with a first bidirectional multiphase multiple chopping module, the first bidirectional multiphase multiple chopping module is connected with a second bidirectional multiphase multiple chopping module through an inductance module, the second bidirectional multiphase multiple chopping module is connected with a bidirectional direct current/alternating current module, the bidirectional direct current/alternating current module is connected with a sine wave filter, the sine wave filter is connected with a load or a power grid through an isolation grid-connected transformer, a first control system is connected with the first bidirectional multiphase multiple chopping module and the second bidirectional multiphase multiple chopping module, a second control system is connected with the bidirectional direct current/alternating current module, and the first control system is connected with the second control system. The invention can adapt and regulate the bidirectional flow of the power supply and the energy input by different specifications.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a wide-input bidirectional power supply device.
Background
With the continuous development of global economy and the continuous growth of world population, people are increasingly free from electric energy. With rapid development of technology, solar photovoltaic power generation, full utilization of wind power generation, full utilization of regenerated energy, power grid or other power supply sources combined with various energy storage battery pack electric energy and the like can now make human beings face a lot of power supply problems: (1) The increasing demand for electrical energy, with the continuous consumption of traditional fossil energy, coal, oil, gas, and their non-renewable nature, has not been possible to meet all of our power requirements; (2) With the popularization of solar photovoltaic power generation and wind power generation, the regenerated energy is fully utilized, but the generated electric energy, the regenerated energy and the energy of other power supplies cannot be utilized in time, not all the electric energy can be fed back to a power grid in time, and meanwhile, the electric energy is required to be fully utilized because of different utilization types and different voltage levels in different areas. The problems are faced with the regenerated energy generated in the industrial application process, the regenerated energy generated in the urban rail transit process, the energy generated by wind power generation and other approaches, the energy of the energy storage battery pack and the like; (3) With the improvement of the energy conservation consciousness of the whole society, the electric energy generated in life and various production, especially various industrial production, comprises various solar photovoltaics and wind power generation and other power generation, and cannot be fed back to the energy of a power grid in time, and the energy stored in the energy storage battery packs is totally stored in various energy storage battery packs, so that the problem of full utilization of the energy storage battery packs is also urgently needed to be solved; (4) The human activities in the areas without power supply grids are increasing (outdoor exploration, travel and the like), and the daily power requirements of the human beings are met, and the energy storage battery pack is needed for power supply; (7) Along with the acceleration of the urban process, the accelerated development of intelligent home, the rapid development of smart cities and the popularization of electric vehicles, on one hand, a convenient and fast charging and power supply mode is urgently needed to meet the power supply requirement, and in addition, the electric vehicles can be used as a carrier of electric energy and can fully utilize the electric energy in batteries of the electric vehicles. To fully utilize this electrical energy, or to fully utilize the electrical energy within various energy storage battery packs, one of the most critical problems is: at present, the power supply range of various photovoltaic and wind power generation and energy storage battery pack power supplies in the market is very wide (100-1200V (volt) direct current), and three-phase alternating current of 400V/660V/1140V is needed in industrial application, so that the invention is necessary to design a power supply which can adapt to the wide input range to meet the requirements, and therefore the market is occupied as soon as possible, and high economic benefit is obtained. Meanwhile, the bidirectional transmission of energy can be further realized, and the regenerated energy generated in industrial loads or urban rail transit and the like can be fully utilized.
The main problems of the current power supply are as follows: referring to fig. 1 and 2, fig. 1 is a conventional low-voltage section power supply device provided by the present invention, and fig. 2 is a conventional high-voltage section power supply device provided by the present invention. As shown in fig. 1 and 2, i.e., two input voltage specification levels, dc 100-600V and dc 600-1200V.
1. For a power supply input by direct current 100-600V, a boost chopper circuit is designed, the input direct current 100-600V power supply is boosted and stabilized to direct current 600V, and the direct current is provided for an inverter, and is output to an isolation grid-connected transformer, and an indirect load is a motor, a switching power supply and the like;
2. for a power supply input by 600-1200V of direct current, a step-down chopper circuit is designed, the input direct current 600-1200V power supply is stepped down and stabilized to be 600V of direct current, an inverter is provided, a direct load is output to an isolation grid-connected transformer, and an indirect load is a motor, a switching power supply and the like;
3. because the direct load at the output side of the power supply is an isolation grid-connected transformer, the indirect load is a motor, a switching power supply and the like, when the capacity of the power supply is 10kVA (kilovolt x ampere), the starting current requirement of a motor in the indirect load is met, and when the direct current is input at 600V, the maximum current is 36A (amp), so that when the minimum direct current is input at 100V, the maximum current of an energy storage battery pack and a boost chopper circuit shown in the figure 1 is more than 220A, and the current is difficult to realize for a general boost chopper circuit;
4. The two power supplies cannot realize bidirectional flow of energy, and cannot store regenerated energy in a load into a battery pack, so that not only is energy wasted, but also the regenerated energy is consumed by an external energy consumption resistor, and the instability of the power supply is increased.
The power supply devices cannot adapt to wide input power sources and cannot be used universally, and in the use process, the power supply devices must be distinguished, so that two power supplies with different specifications are often purchased, the cost is increased, the application maintenance management cost is also increased, the power supply devices cannot be widely applied to various industrial production, and the bidirectional transmission of energy cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a wide-input bidirectional power supply device, which can solve the technical problems that the power supply device in the prior art cannot adapt to a wide-input power supply and cannot realize bidirectional transmission of energy.
The first aspect of the present invention provides a wide-input bi-directional power supply apparatus, comprising: the device comprises an energy storage battery pack, a direct current breaker, an electromagnetic interference filter, a first bidirectional multiphase multiple chopping module, an inductance module, a second bidirectional multiphase multiple chopping module, a bidirectional direct current/alternating current module, a sine wave filter, an isolation grid-connected transformer, a first control system and a second control system;
The positive and negative ends of the energy storage battery pack are connected with the electromagnetic interference filter through the direct current breaker, the electromagnetic interference filter is connected with the first bidirectional multiphase multiple chopping module, the first bidirectional multiphase multiple chopping module is connected with the second bidirectional multiphase multiple chopping module through the inductance module, the second bidirectional multiphase multiple chopping module is connected with the bidirectional direct current/alternating current module, the bidirectional direct current/alternating current module is connected with the sine wave filter, the sine wave filter is connected with a load and is connected with the load or a power grid through the isolation grid-connected transformer, the first control system is connected with the first bidirectional multiphase multiple chopping module and the second bidirectional multiphase multiple chopping module, the second control system is connected with the bidirectional direct current/alternating current module, and the first control system is connected with the second control system.
Optionally, the first bidirectional multiphase multiple chopping module and the second bidirectional multiphase multiple chopping module each include at least one phase structure, the inductance module includes at least one inductor, the number of the inductors is the same as the maximum number of the phase structures in the two bidirectional multiphase multiple chopping modules, the plurality of phase structures in the same bidirectional multiphase multiple chopping module are all connected in parallel, the capacitor is connected in parallel with the phase structures, and the phase structures in the two different bidirectional multiphase multiple chopping modules are connected through the inductors.
Optionally, the phase structure includes two switch tubes, the collector of the upper switch tube of each phase structure of each two-way multiphase multiple chopper module is connected with one end of the capacitor, the emitter of the upper switch tube is connected with the collector of the lower switch tube, the emitter of the lower switch tube is connected with the other end of the capacitor, the gate of the switch tube is opened, the other ends of the capacitors in the two-way multiphase multiple chopper modules are connected with each other, and two ends of the inductor are respectively connected between the two switch tubes of the phase structure in the two different two-way multiphase multiple chopper modules.
Optionally, when the number of phase structures in the first bidirectional multiphase multiple chopper module and the second bidirectional multiphase multiple chopper module is the same, two switching tubes of each corresponding sequential phase structure in the two bidirectional multiphase multiple chopper modules are connected through an inductor.
Optionally, when the phase structure of one of the two-way multiphase multiple chopper modules is one, the phase structure of the other two-way multiphase multiple chopper module is at least two, one end of each inductor is connected with the phase structure of one of the two-way multiphase multiple chopper modules, and the other end of each inductor is connected with two switching tubes of each phase structure of the other two-way multiphase multiple chopper module respectively.
Optionally, the bidirectional direct current/alternating current module includes at least one phase structure, a plurality of phase structures are connected in parallel, a collector electrode of an upper switching tube of each phase structure is connected with one end of a capacitor in the second bidirectional multiphase multiple chopping module, and an emitter electrode of a lower switching tube of each phase structure is connected with the other end of the capacitor in the second bidirectional multiphase multiple chopping module.
Optionally, the sine wave filter includes at least one inductor and at least one capacitor, the number of the inductors and the capacitors of the sine wave filter, the number of the input ends and the output ends of the isolation grid-connected transformer are the same as the number of the phase structures of the bidirectional direct current/alternating current module, one end of each inductor is connected between two switching tubes of each phase structure of the bidirectional direct current/alternating current module, the other end of each inductor is connected with each input end of the isolation grid-connected transformer and is connected with a load through an alternating current switch, each output end of the isolation grid-connected transformer is connected with the load or a power grid through an alternating current switch, one end of each capacitor is connected with the other end of each inductor, and the other ends of each capacitor are connected together.
The second aspect of the present invention also provides a wide-input bi-directional power supply apparatus, comprising: when the device provides energy for a load or a power grid, the first control system controls the first bidirectional multiphase multiple chopping module and the second bidirectional multiphase multiple chopping module to enable the energy storage battery pack to output a first direct current voltage to the bidirectional direct current/alternating current module, and the second control system controls the bidirectional direct current/alternating current module to convert the first direct current voltage into a first alternating current voltage;
when the device stores energy, the second control system controls the bidirectional direct current/alternating current module to convert a second alternating current voltage provided by a load or a power grid into a second direct current voltage, and the first control system controls the first bidirectional multi-phase multi-chopping module and the second bidirectional multi-phase multi-chopping module to output the second direct current voltage to the energy storage battery pack.
Optionally, when the voltage level of the energy storage battery pack is in a low voltage interval and the device provides energy for a load or a power grid, the first control system controls all upper switching tubes in the first bidirectional multiphase multiple chopping module to be normally open, and all lower switching tubes to be normally closed, and simultaneously controls the second bidirectional multiphase multiple chopping module to be a boost chopping module, so that the voltage in the energy storage battery pack is boosted to a first direct current voltage, and the second control system controls the bidirectional direct current/alternating current module to convert the first direct current voltage into the first alternating current voltage and output the first alternating current voltage to the load or the power grid;
When the voltage level of the energy storage battery pack is in a low voltage range and the device stores energy, the second control system controls the bidirectional direct current/alternating current module to convert the second alternating current voltage into the second direct current voltage, the first control system controls all upper switching tubes in the first bidirectional multiphase multiple chopping module to be normally open, and all lower switching tubes to be normally closed, and simultaneously controls the second bidirectional multiphase multiple chopping module to be a step-down chopping module, and the second direct current voltage is output to the energy storage battery pack after being stepped down.
Optionally, when the voltage level of the energy storage battery pack is a high voltage interval and the device provides energy for a load or a power grid, all upper switching tubes in the second bidirectional multiphase multiple chopper modules are controlled to be normally open, all lower switching tubes are controlled to be normally closed, meanwhile, the first control system controls the first bidirectional multiphase multiple chopper modules to be a step-down chopper module, the voltage in the energy storage battery pack is reduced to the first direct current voltage, and the second control system controls the bidirectional direct current/alternating current module to convert the first direct current voltage into the first alternating current voltage and output the first alternating current voltage to the load or the power grid;
When the voltage level of the energy storage battery pack is a high voltage interval and the device stores energy, the second control system controls the bidirectional direct current/alternating current module to convert the second alternating current voltage into the second direct current voltage, controls all upper switching tubes in the second bidirectional multiphase multiple chopping module to be normally open and all lower switching tubes to be normally closed, and simultaneously controls the first bidirectional multiphase multiple chopping module to be a boost chopping module, and outputs the boosted second direct current voltage to the energy storage battery pack.
The wide-input bidirectional power supply device provided by the invention can meet various application occasions and wide input voltage ranges through a modularized design, is suitable for various voltage equipment and portable equipment, and particularly supports a multifunctional power supply device for supplying power to various electric equipment such as solar energy, energy storage battery packs and the like. The invention fully utilizes solar energy, wind energy and an energy storage battery pack, adjusts and inputs various input voltages according to the needs to meet the power supply requirements of different devices, can realize variable-frequency speed regulation and direct power supply, and can also realize bidirectional flow of feedback power grid and energy. The invention has the characteristics of ingenious and portable design, wide application, high power supply stability, modularized structure and high reliability, meets the requirements of various occasions, and has the outstanding characteristics of being capable of adapting and adjusting the bidirectional flow of power sources and energy input by different specifications and having high market application value.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a conventional low-voltage section power supply device provided by the present invention;
fig. 2 is a schematic diagram of a conventional high-voltage section power supply device according to the present invention;
fig. 3 is a schematic structural diagram of a wide-input bidirectional power supply device according to a first embodiment of the present invention;
fig. 4 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a second embodiment of the present invention;
fig. 5 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a third embodiment of the present invention;
fig. 6 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a fourth embodiment of the present invention;
fig. 7 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a fifth embodiment of the present invention;
fig. 8 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a sixth embodiment of the present invention;
Fig. 9 is a circuit configuration diagram of a wide-input bidirectional power supply device according to a seventh embodiment of the present invention;
fig. 10 is a circuit configuration diagram of a wide-input bi-directional power supply device according to an eighth embodiment of the present invention;
FIG. 11 is a block diagram of a wide-input bi-directional power supply device according to a ninth embodiment of the present invention;
FIG. 12 is a block diagram illustrating operation of the energy storage device of the wide-input bi-directional power supply according to the tenth embodiment of the present invention;
fig. 13 is a schematic diagram of operation of a low voltage section energy storage battery pack in a wide input bi-directional power supply device according to an eleventh embodiment of the present invention;
fig. 14 is a schematic diagram of operation of energy storage of an energy storage battery pack in a low voltage range in a wide-input bi-directional power supply device according to a twelfth embodiment of the present invention;
fig. 15 is a schematic diagram of a wide-input bi-directional power supply device according to a thirteenth embodiment of the present invention;
fig. 16 is a schematic diagram of operation of the energy storage battery pack in the high voltage section of the wide-input bi-directional power supply device according to the fourteen embodiments of the present invention;
FIG. 17 is a system flow diagram of a fifteen-provided wide-input bi-directional power supply device according to an embodiment of the present invention;
FIG. 18 is a flowchart of a wide input bi-directional power supply apparatus providing power in accordance with a sixteenth embodiment of the present invention;
FIG. 19 is a flowchart of the operation of the wide input bi-directional power supply device according to seventeenth embodiment of the present invention;
FIG. 20 is a flowchart of a wide input bi-directional power supply apparatus providing power according to an embodiment of the present invention;
fig. 21 is a flowchart of the operation of the wide input bi-directional power supply device according to nineteenth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures in the present invention are described in detail below, wherein it is apparent that the described embodiments are only some embodiments but not all embodiments of the present invention. All other embodiments, based on the embodiments of the invention, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the invention.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a wide-input bidirectional power supply device according to an embodiment of the invention.
As shown in fig. 3, a first aspect of the present invention provides a wide-input bi-directional power supply apparatus, comprising: the energy storage battery pack 1, the direct current breaker 2, the electromagnetic interference filter 3, the first bidirectional multiphase multiple chopper module 4, the inductance module 5, the second bidirectional multiphase multiple chopper module 6, the bidirectional direct current/alternating current module 7, the sine wave filter 8, the isolation grid-connected transformer 9, the first control system 10 and the second control system 11.
The positive and negative ends of the energy storage battery pack 1 are respectively connected with the electromagnetic interference filter 3 through a direct current breaker 2, the electromagnetic interference filter 3 is connected with the first bidirectional multiphase multiple chopping module 4, the first bidirectional multiphase multiple chopping module 4 is connected with the second bidirectional multiphase multiple chopping module 6 through an inductance module 5, the second bidirectional multiphase multiple chopping module 6 is connected with the bidirectional direct current/alternating current module 7, the bidirectional direct current/alternating current module 7 is connected with the sine wave filter 8, the sine wave filter 8 is connected with a load through a second alternating current switch 12 and is connected with the load or a power grid through an isolation grid-connected transformer 9 through a first alternating current switch 13, the first control system 10 is connected with the first bidirectional multiphase multiple chopping module 4 and the second bidirectional multiphase multiple chopping module 6, the first control system 10 is respectively connected with the first bidirectional multiphase multiple chopping module 4 and the second bidirectional multiphase multiple chopping module 6 through PWM (Pulse Width Modulation ), the second control system 11 is connected with the bidirectional direct current/alternating current module 7 through SPWM (Sinusoidal Pulse Width Modulation, sine modulation), and the first control system 10 is connected with the second control system 10 through a local area network. The first control system 10 and the second control system 11 both sample signals of the first bidirectional multiphase multiple chopper module 4 and the second bidirectional multiphase multiple chopper module 6 through the switched capacitor circuit, so as to control the first bidirectional multiphase multiple chopper module 4 and the second bidirectional multiphase multiple chopper module 6 according to the sampled signals.
Referring to fig. 4 to 10, fig. 4 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a second embodiment of the present invention, fig. 5 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a third embodiment of the present invention, fig. 6 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a fourth embodiment of the present invention, fig. 7 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a fifth embodiment of the present invention, fig. 8 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a sixth embodiment of the present invention, fig. 9 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a seventh embodiment of the present invention, and fig. 10 is a circuit configuration diagram of a wide-input bi-directional power supply device according to a eighth embodiment of the present invention.
Further, the first bi-directional multi-phase multi-chopper module 4 and the second bi-directional multi-phase multi-chopper module 6 each comprise at least one phase structure, the inductance module 5 comprises at least one inductor, the number of the inductors is the same as the maximum number of the phase structures in the two bi-directional multi-phase multi-chopper modules, the plurality of phase structures in the same bi-directional multi-phase multi-chopper module are all connected in parallel, the capacitor is connected in parallel with the phase structures, and the phase structures in the two different bi-directional multi-phase multi-chopper modules are connected through the inductors.
Further, the phase structure comprises two switching tubes, the collector electrode of the upper switching tube of each phase structure of each bidirectional multiphase multiple chopping module is connected with one end of a capacitor, the emitter electrode of the upper switching tube is connected with the collector electrode of the lower switching tube, the emitter electrode of the lower switching tube is connected with the other end of the capacitor, the gate electrodes of the switching tubes are all open-circuited, the other ends of the capacitors in the two bidirectional multiphase multiple chopping modules are connected with each other, and the two ends of the inductor are respectively connected between the two switching tubes of the phase structure in the two different bidirectional multiphase multiple chopping modules.
Further, as shown in fig. 4 to 6, when the number of phase structures in the first bi-directional multi-phase multi-chopper module 4 and the second bi-directional multi-phase multi-chopper module 6 is the same, two switching tubes of each corresponding sequential phase structure in the two bi-directional multi-phase multi-chopper modules are connected through one inductor.
Further, as shown in fig. 7 to 10, when the phase structure of one of the bidirectional multiphase multiple chopper modules is one, and the phase structure of the other bidirectional multiphase multiple chopper module is at least two, one end of each inductor is connected with the phase structure of one of the bidirectional multiphase multiple chopper modules, and the other end of each inductor is connected with two switching tubes of each phase structure of the other bidirectional multiphase multiple chopper module.
Further, as shown in fig. 3 to 16, the bidirectional dc/ac module 7 includes at least one phase structure, a plurality of phase structures are connected in parallel, a collector of an upper switching tube of each phase structure is connected to one end of a capacitor in the second bidirectional multi-phase multiple chopper module 6, and an emitter of a lower switching tube of each phase structure is connected to the other end of the capacitor in the second bidirectional multi-phase multiple chopper module 6.
Further, as shown in fig. 3 to 16, the sine wave filter 8 includes at least one inductor and at least one capacitor, the number of the inductors and the capacitors of the sine wave filter 8, the number of the input ends and the output ends of the isolation grid-connected transformer 9 are the same as the number of the phase structures of the bidirectional direct current/alternating current module 7, one end of each inductor is connected between two switching tubes of each phase structure of the bidirectional direct current/alternating current module 7, the other end of each inductor is connected with each input end of the isolation grid-connected transformer 9 and connected with a load through an alternating current switch, each output end of the isolation grid-connected transformer 9 is connected with the load or a power grid through an alternating current switch, one end of each capacitor is connected with the other end of each inductor, and the other ends of each capacitor are connected together.
In the present invention, taking the first bidirectional multiphase multiple chopper module 4 and the second bidirectional multiphase multiple chopper module 6 each include 3 phase structures as an example, the first bidirectional multiphase multiple chopper module 4 includes an upper switching tube V1, an upper switching tube V3, an upper switching tube V5, a lower switching tube V2, a lower switching tube V4, and a lower switching tube V6, and the first bidirectional multiphase multiple chopper module 4 is connected in parallel with the capacitor C1. The second bidirectional multi-phase multi-chopper module 6 comprises an upper switch tube V7, an upper switch tube V9, an upper switch tube V11, a lower switch tube V8, a lower switch tube V12 and a lower switch tube V14, and the second bidirectional multi-phase multi-chopper module 6 is connected in parallel with the capacitor C2. The inductance module 5 includes an inductor L1, an inductor L2, and an inductor L3. Taking the example that the sine wave filter 8 comprises 3 inductors and 3 capacitors, i.e. that the sine wave filter 8 comprises an inductor L4, an inductor L5, an inductor L6, a capacitor C3, a capacitor C4, a capacitor C5, the sine wave filter 8 is connected to a load via three second ac switches 12 and to the load or grid via an isolating grid-connected transformer 9 via three first ac switches 13.
Referring to fig. 11 to 21, fig. 11 is a schematic diagram of energy supply from a wide-input bi-directional power supply device according to a ninth embodiment of the present invention, fig. 12 is a schematic diagram of energy storage from a high-voltage section energy storage battery in a wide-input bi-directional power supply device according to a tenth embodiment of the present invention, fig. 13 is a schematic diagram of energy storage from a low-voltage section energy storage battery in a wide-input bi-directional power supply device according to a fifteenth embodiment of the present invention, fig. 14 is a schematic diagram of energy storage from a low-voltage section energy storage battery in a twelfth embodiment of the present invention, fig. 15 is a schematic diagram of energy storage from a high-voltage section energy storage battery in a thirteenth embodiment of the present invention, fig. 16 is a schematic diagram of energy storage from a high-voltage section energy storage battery in a fourteenth embodiment of the wide-input bi-directional power supply device according to a fourteenth embodiment of the present invention, fig. 17 is a systematic flow diagram of energy storage from a fifteenth embodiment of the present invention, fig. 18 is a schematic diagram of energy storage from a sixteen embodiment of the wide-input bi-directional power supply device according to a seventeenth embodiment of the present invention, fig. 14 is a schematic diagram of energy storage from a seventeenth embodiment of the present invention, fig. 19 is a schematic diagram of energy storage from a seventeenth embodiment of the wide-input bi-directional power supply device according to a seventeenth embodiment of the present invention, and fig. 16 is a schematic diagram of energy storage from a seventeenth embodiment of the high-input bi-directional power supply device according to a seventeenth embodiment of the present invention, and fig. 20 is a schematic diagram of the energy storage from a thin-input bi-directional power supply device according to a fifteenth embodiment of the present invention.
For convenience of explanation, the power frequency transformer in fig. 17 to 21 is the isolation grid-connected transformer 9 in the wide-input bidirectional power supply device provided by the invention.
Further, as shown in fig. 11 and 18, when the apparatus supplies energy to a load or a power grid, the first control system 10 controls the first bi-directional multi-phase multi-chopper module 4 and the second bi-directional multi-phase multi-chopper module 6 to make the energy storage battery pack 1 output a first direct current voltage to the bi-directional direct current/alternating current module 7, and the second control system 11 controls the bi-directional direct current/alternating current module 7 to convert the first direct current voltage into a first alternating current voltage.
As shown in fig. 12 and 19, when the device stores energy, the second control system 11 controls the bi-directional dc/ac module 7 to convert the second ac voltage provided by the load or the power grid into the second dc voltage, and the first control system 10 controls the first bi-directional multi-phase multi-chopper module 4 and the second bi-directional multi-phase multi-chopper module 6 to output the second dc voltage to the energy storage battery pack 1. In the embodiment of the invention, the first direct current voltage is direct current 600V, the second direct current voltage is direct current 620V, the first alternating current voltage and the second alternating current voltage are both alternating current 400V/50Hz, and in other embodiments, the values of the first direct current voltage, the second direct current voltage, the first alternating current voltage and the second alternating current voltage are not limited to the values.
Further, as shown in fig. 13 and 20, when the voltage level of the energy storage battery pack 1 is in a low voltage range and the device provides energy to a load or a power grid, the first control system 10 controls all upper switching tubes in the first bidirectional multiphase multiple chopping module 4 to be normally open, all lower switching tubes to be normally closed, and simultaneously controls the second bidirectional multiphase multiple chopping module 6 to be a boost chopping module to boost the voltage in the energy storage battery pack 1 to a first direct current voltage, and the second control system 11 controls the bidirectional direct current/alternating current module 7 to convert the first direct current voltage to a first alternating current voltage to be output to the load or the power grid.
As shown in fig. 14 and 21, when the voltage level of the energy storage battery 1 is in the low voltage range and the device stores energy, the second control system 11 controls the bi-directional dc/ac module 7 to convert the second ac voltage into the second dc voltage, the first control system 10 controls all the upper switching tubes in the first bi-directional multi-phase multi-chopper module 4 to be normally open, and all the lower switching tubes to be normally closed, and simultaneously controls the second bi-directional multi-phase multi-chopper module 6 to be a step-down chopper module, and outputs the second dc voltage to the energy storage battery 1 after step-down.
Further, as shown in fig. 15 and 20, when the voltage level of the energy storage battery pack 1 is in a high voltage range and the device provides energy to a load or a power grid, all upper switching tubes in the second bidirectional multiphase multiple chopper module 6 are controlled to be normally open, all lower switching tubes are controlled to be normally closed, meanwhile, the first control system 10 controls the first bidirectional multiphase multiple chopper module 4 to be a step-down chopper module to step down the voltage in the energy storage battery pack 1 to a first direct current voltage, and the second control system 11 controls the bidirectional direct current/alternating current module 7 to convert the first direct current voltage into a first alternating current voltage to be output to the load or the power grid.
As shown in fig. 16 and 21, when the voltage level of the energy storage battery 1 is in the high voltage range and the device stores energy, the second control system 11 controls the bi-directional dc/ac module 7 to convert the second ac voltage into the second dc voltage, controls all the upper switching tubes in the second bi-directional multi-phase multi-chopper module 6 to be normally open and all the lower switching tubes to be normally closed, and simultaneously controls the first bi-directional multi-phase multi-chopper module 4 to be a boost chopper module, and outputs the boosted second dc voltage to the energy storage battery 1.
In the embodiment of the present invention, the low voltage interval in the voltage class of the energy storage battery 1 is dc 100-600V, and the high voltage interval is dc 600-1200V, and in other embodiments, the low voltage interval and the high voltage interval in the voltage class of the energy storage battery 1 are not limited thereto.
For some defects existing in the traditional power supply, the invention provides an effective solving device and widens the functions of the device. The invention provides a wide-input bidirectional power supply device integrating the power electronic technology and intelligent control, which has the advantages of ingenious design, effective control, high intelligent degree, suitability for wide-input power supply, energy bidirectional flow realization, safe use, energy conservation, environmental protection and the like.
The power supply device has the remarkable characteristics that the power supply device can realize wide input and bidirectional energy flow, can realize full utilization of energy of the energy storage battery packs 1 with different specifications through a control algorithm, has the advantages of rapidness, safety, energy conservation, environmental protection and the like, and has the structure shown in figure 3. Namely, the energy storage battery pack 1 of various specifications is → the direct current breaker 2 is → the electromagnetic interference filter 3 is → the first bidirectional multi-phase multi-chopping module 4 is → the inductance module 5 is → the second bidirectional multi-phase multi-chopping module 6 is → the bidirectional direct current/alternating current module 7 is → the sine wave filter 8 is → the load or the power grid. The working principle is as follows:
as shown in fig. 3, the wide-input bidirectional power supply device is composed of 11 parts, an energy storage battery pack 1, a direct current breaker 2, an electromagnetic interference filter 3, a first bidirectional multiphase multiple chopper module 4, an inductance module 5, a second bidirectional multiphase multiple chopper module 6, a bidirectional direct current/alternating current module 7, a sine wave filter 8, an isolation grid-connected transformer 9, a first control system 10, a second control system 11 and the like with various specifications, and the system can realize the bidirectional flow of wide-input power supply and energy.
For the two bidirectional multiphase multiple chopper modules in fig. 3, the topology circuit structure of the bidirectional multiphase multiple chopper modules is designed according to the three-phase triple chopper modules, the topology circuit structure adopts a modularized design, and each phase is a module structure, namely a phase structure, and the two phases can be selected according to the practical application requirements. Fig. 4 shows a topology of two bidirectional three-phase triple chopper modules, each of which consists of 3 phase structures. The topology that can be composed is shown in fig. 4-10.
It can be understood that when the multiphase multiple chopper modules each include n phase structures, the number of topology circuits that can be formed by the two multiphase multiple chopper modules is n+2 (n-1) =3n-2, where the two multiphase multiple chopper modules have n circuit structures when the phase structures are the same, and have 2 (n-1) circuit structures when one of the multiphase multiple chopper modules has one phase structure and the other multiphase multiple chopper module has at least two phase structures.
As shown in fig. 3, when the bidirectional wide input power supply supplies energy to a load or a power grid, the energy flows from the energy storage battery pack 1 of various specifications to the load or the power grid: the energy storage battery pack 1, the direct current breaker 2 and the electromagnetic interference filter 3, the first bidirectional three-phase triple chopper module, the second bidirectional three-phase triple chopper module, the bidirectional direct current/alternating current module 7, the sine wave filter 8, the load or isolation grid-connected transformer 9 and the power grid or load. When the bidirectional wide-input power supply stores energy, the energy flows from the power grid or the load to the energy storage battery pack 1: load or grid- & gt sine wave filter 8- & gt bidirectional direct current/alternating current module 7- & gt first bidirectional three-phase triple chopper module- & gt second bidirectional three-phase triple chopper module- & gt direct current breaker 2 and electromagnetic interference filter 3- & gt energy storage battery pack 1.
As shown in fig. 11, when the bidirectional wide-input power supply supplies energy to a load or a power grid, the first bidirectional three-phase triple chopper module and the second bidirectional three-phase triple chopper module output stable direct current 600V to be supplied to the bidirectional direct current/alternating current module 7, so that the bidirectional wide-input power supply can adapt to an input power supply with a larger fluctuation range, and adapt to the energy storage battery pack 1 with a direct current 100V-direct current 1200V range. When the power supply stores energy, as shown in fig. 12, the second control system 11 controls the bidirectional dc/ac module 7 to controllably rectify and output a stable dc voltage of 620V, and the energy storage battery 1 can be charged quickly by combining the coordinated operation of the first bidirectional three-phase triple chopper module and the second bidirectional three-phase triple chopper module, without adding an energy consumption resistor unit, thereby improving the control performance, safety performance, reliability and power factor of the power supply and realizing charging of the energy storage battery 1 of all specifications.
Taking the circuit topology structure of fig. 4 as an example to illustrate the working principle of the wide input power supply, the working principle of other circuit topologies of fig. 3 is the same as that of fig. 4: when the voltage level of the energy storage battery pack 1 is 100-600V, as shown in fig. 13, the first control system 10 controls the upper switching tubes V1, V3 and V5 in the first bidirectional three-phase triple chopper module to be normally open, the lower switching tubes V4, V6 and V2 to be normally closed, and the first bidirectional three-phase triple chopper module only serves as a conducting function when the power supply supplies energy. Meanwhile, the second bidirectional three-phase triple chopper module is controlled to be three-phase triple boost chopper, the voltage in the energy storage battery pack is boosted to stable direct current 600V, and the stable direct current 600V is provided for the following direct current/alternating current inversion module. The second control system 11 controls the bidirectional direct current/alternating current module 7 to be an inversion module, outputs variable-frequency and speed-adjustable voltage to be provided for a load, or outputs sinusoidal alternating current voltage of 400V/50Hz (Hertz) to be connected with a grid or directly provided for the load through the isolation grid-connected transformer 9.
When the voltage level of the energy storage battery pack 1 is 100-600V, as shown in fig. 14, the second control system 11 controls the bidirectional dc/ac module 7 to be an ac/dc rectifying module to rectify the regenerated energy in the load or the ac voltage in the power grid into a stable dc 620V. In the same way, the first control system 10 controls the first bidirectional three-phase triple chopper module to serve as a conducting function only, and simultaneously controls the second bidirectional three-phase triple chopper module to perform three-phase triple step-down chopping, so that the direct current 620V is stepped down to the direct current 100-600V in the energy storage battery pack, and the energy storage battery pack 1 is charged.
When the voltage level of the energy storage battery pack 1 is 600-1200V, as shown in fig. 15, the first control system 10 controls the upper switching tubes V7, V9 and V11 in the second bidirectional three-phase triple chopper module to be normally open, the lower switching tubes V10, V12 and V8 to be normally closed, and the second bidirectional three-phase triple chopper module only serves as a conducting function. Meanwhile, the first bidirectional three-phase triple chopper module is controlled to be three-phase triple buck chopper, the voltage in the energy storage battery pack is reduced to be 600V of stable direct current, and a rear direct current/alternating current inversion module is provided. The second control system 11 controls the bidirectional direct current/alternating current module 7 to be an inversion module, outputs variable-frequency speed-regulating voltage to be provided for a load, or outputs sinusoidal alternating current voltage of 400V/50Hz to be connected with the grid or directly provided for the load through the isolation grid-connected transformer 9.
When the voltage level of the energy storage battery pack 1 is 600-1200V, as shown in fig. 16, the second control system 11 controls the bidirectional dc/ac module 7 to be an ac/dc rectifying module to rectify the regenerated energy in the load or the ac voltage in the power grid into a stable dc voltage of 620V. In the same way, the first control system 10 controls the second bidirectional three-phase triple chopper module to serve as a conduction function only, and simultaneously controls the first bidirectional three-phase triple chopper module to perform three-phase triple boost chopping, so that the direct current 620V is boosted to the direct current 600-1200V in the energy storage battery pack, and the energy storage battery pack 1 is charged.
The AC power supply with the voltage level of 660V/50Hz and 1140V/50Hz can be output by only changing the wiring of the isolation grid-connected transformer 9.
The first control system 10 and the second control system 11 in the wide-input bidirectional power supply device start intelligent power supply operation according to instructions according to the operating states of the various modules, the power grid and power supply load state requirements and the like according to the voltage level of the detected energy storage battery pack 1. The two control systems reasonably control the power supply source to supply power for energy storage through data exchange, different application working conditions can be effectively realized, the device is suitable for wide-range input voltage, particularly in the energy storage process, the regenerated energy or the energy of a power grid can be rapidly stored, the rapid energy storage can be realized, the power supply source device cannot be damaged, and the service life of the bidirectional wide-input power supply source device is prolonged.
The invention has simple circuit structure, low cost, easy control and high cost performance, utilizes the power electronic technology and the full-digital intelligent technology to realize the high-efficiency utilization of the wide input power supply input and the electric energy, can more effectively realize various special working conditions of the application of the power supply by the bidirectional flow energy of the energy, realizes the effective utilization of the regenerated energy, prolongs the service life and the use efficiency of the power supply, can adapt to different loads and different application environments, and avoids the instability of a power supply grid. The energy storage battery pack 1 has the energy storage function and the instantaneous heavy current discharge function, avoids the waste of energy sources, realizes energy conservation and environmental protection, and improves the control performance, the application performance, the general performance and the use safety performance of the whole product.
The wide-input bidirectional power supply device provided by the invention can meet various application occasions and wide input voltage ranges through a modularized design, is suitable for various voltage equipment and portable equipment, and particularly supports a multifunctional power supply device for supplying power to various electric equipment such as solar energy, energy storage battery packs and the like. The invention fully utilizes solar energy, wind energy and an energy storage battery pack, adjusts and inputs various input voltages according to the needs to meet the power supply requirements of different devices, can realize variable-frequency speed regulation and direct power supply, and can also realize bidirectional flow of feedback power grid and energy. The invention has the characteristics of ingenious and portable design, wide application, high power supply stability, modularized structure and high reliability, meets the requirements of various occasions, and has the outstanding characteristics of being capable of adapting and adjusting the bidirectional flow of power sources and energy input by different specifications and having high market application value.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. The foregoing describes a wide-input bi-directional power supply device provided by the present invention, and those skilled in the art, based on the concepts of the embodiments of the present invention, will be able to implement the present invention in various ways, both in terms of specific embodiments and application ranges.
Claims (2)
1. A wide input bi-directional power supply apparatus, comprising: the device comprises an energy storage battery pack (1), a direct current breaker (2), an electromagnetic interference filter (3), a first bidirectional multiphase multiple chopper module (4), an inductance module (5), a second bidirectional multiphase multiple chopper module (6), a bidirectional direct current/alternating current module (7), a sine wave filter (8), an isolation grid-connected transformer (9), a first control system (10) and a second control system (11);
the positive pole of the energy storage battery pack (1) is connected with an electromagnetic interference filter (3) through a direct current breaker (2), the negative pole is connected with the electromagnetic interference filter (3) through another direct current breaker (2), the electromagnetic interference filter (3) is connected with the first bidirectional multiphase multiple chopper module (4), the first bidirectional multiphase multiple chopper module (4) is connected with the second bidirectional multiphase multiple chopper module (6) through the inductance module (5), the second bidirectional multiphase multiple chopper module (6) is connected with the bidirectional direct current/alternating current module (7), the bidirectional direct current/alternating current module (7) is connected with the sine wave filter, the sine wave filter is connected with a load or a power grid through the isolation grid-connected transformer (9), the first control system (10) is connected with the first bidirectional multiphase multiple chopper module (4) and the second bidirectional multiphase multiple chopper module (6), and the second control system (11) is connected with the first control system (11); a first control system (10) and a second control system (11) in the wide-input bidirectional power supply device start intelligent power supply operation according to instructions according to the requirements of the working states, the power grid and the power supply load states of all modules and the voltage level of the detected energy storage battery pack;
The first bidirectional multiphase multiple chopper module (4) and the second bidirectional multiphase multiple chopper module (6) comprise at least one phase structure, the inductance module (5) comprises at least one inductor, the number of the inductors is the same as the maximum number of the phase structures in the two bidirectional multiphase multiple chopper modules, the plurality of the phase structures in the same bidirectional multiphase multiple chopper module are all connected in parallel, the capacitor is connected in parallel with the phase structures, and the phase structures in the two different bidirectional multiphase multiple chopper modules are connected through the inductors;
the phase structure comprises two switching tubes, wherein the collector electrode of an upper switching tube of each phase structure of each bidirectional multiphase multiple chopping module is connected with one end of a capacitor, the emitter electrode of the upper switching tube is connected with the collector electrode of a lower switching tube, the emitter electrode of the lower switching tube is connected with the other end of the capacitor, the gate electrodes of the switching tubes are all open-circuited, the other ends of the capacitors in the two bidirectional multiphase multiple chopping modules are connected with each other, and the two ends of an inductor are respectively connected with the serial connection points of the two switching tubes of the phase structure in the two different bidirectional multiphase multiple chopping modules;
the bidirectional direct current/alternating current module (7) comprises at least one phase structure, a plurality of phase structures are connected in parallel, the collector electrode of an upper switching tube of each phase structure is connected with one end of a capacitor in the second bidirectional multi-phase multi-chopping module (6), and the emitter electrode of a lower switching tube of each phase structure is connected with the other end of the capacitor in the second bidirectional multi-phase multi-chopping module (6);
The sine wave filter (8) comprises at least one inductor and at least one capacitor, the number of the inductors and the capacitors of the sine wave filter (8) and the number of the input ends and the output ends of the isolation grid-connected transformer (9) are the same as the number of the phase structures of the bidirectional direct current/alternating current module (7), one end of each inductor is respectively connected with a series connection point of two switching tubes of each phase structure of the bidirectional direct current/alternating current module, the other end of each inductor is connected with each input end of the isolation grid-connected transformer (9) and is connected with a load through an alternating current switch, each output end of the isolation grid-connected transformer (9) is connected with a load or a power grid through another alternating current switch, one end of each capacitor is connected with the other end of each inductor, and the other ends of the capacitors are connected together;
when the number of phase structures in the first bidirectional multiphase multiple chopper module (4) and the second bidirectional multiphase multiple chopper module (6) is the same, the series connection points of two switching tubes of each corresponding sequential phase structure in the two bidirectional multiphase multiple chopper modules are connected through an inductor;
when the phase structure of one of the two-way multiphase multiple chopper modules is one, and the phase structure of the other two-way multiphase multiple chopper module is at least two, one end of each inductor is connected with the phase structure of one of the two-way multiphase multiple chopper modules, and the other end of each inductor is respectively connected with the series connection point of two switching tubes of each phase structure of the other two-way multiphase multiple chopper module;
When the device supplies energy to a load or a power grid, the first control system (10) controls the first bidirectional multiphase multiple chopping module (4) and the second bidirectional multiphase multiple chopping module (6) to enable the energy storage battery pack (1) to output a first direct current voltage to the bidirectional direct current/alternating current module (7), and the second control system (11) controls the bidirectional direct current/alternating current module (7) to convert the first direct current voltage into a first alternating current voltage;
when the device stores energy, the second control system (11) controls the bidirectional direct current/alternating current module (7) to convert a second alternating current voltage provided by a load or a power grid into a second direct current voltage, and the first control system (10) controls the first bidirectional multi-phase multi-chopping module (4) and the second bidirectional multi-phase multi-chopping module (6) to output the second direct current voltage to the energy storage battery pack (1).
2. The device according to claim 1, characterized in that when the voltage level of the energy storage battery (1) is in a low voltage range and the device is providing energy to a load or a power grid, the first control system (10) controls all upper switching tubes in the first bidirectional multiphase multiple chopper module (4) to be normally open, all lower switching tubes to be normally closed, and simultaneously controls the second bidirectional multiphase multiple chopper module (6) to be a boost chopper module, the voltage in the energy storage battery (1) is boosted to a first direct current voltage, and the second control system (11) controls the bidirectional direct current/alternating current module (7) to convert the first direct current voltage into the first alternating current voltage to be output to the load or the power grid;
When the voltage level of the energy storage battery pack (1) is in a low voltage range and the device stores energy, the second control system (11) controls the bidirectional direct current/alternating current module (7) to convert the second alternating current voltage into the second direct current voltage, the first control system (10) controls all upper switching tubes in the first bidirectional multiphase multiple chopping module (4) to be normally open, all lower switching tubes to be normally closed, and simultaneously controls the second bidirectional multiphase multiple chopping module (6) to be a step-down chopping module, and the second direct current voltage is output to the energy storage battery pack (1) after being step-down.
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