CN204376517U - A kind of bidirectional DC-DC converter for direct current network energy storage - Google Patents
A kind of bidirectional DC-DC converter for direct current network energy storage Download PDFInfo
- Publication number
- CN204376517U CN204376517U CN201520006842.8U CN201520006842U CN204376517U CN 204376517 U CN204376517 U CN 204376517U CN 201520006842 U CN201520006842 U CN 201520006842U CN 204376517 U CN204376517 U CN 204376517U
- Authority
- CN
- China
- Prior art keywords
- net side
- converter
- inductance
- direct current
- bidirectional
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relate to a kind of bidirectional DC-DC converter for direct current network energy storage, by L
ic
i(i=1,2 ... n) filter unit, half-bridge circuit, net side inductance L and net side filter capacitor C combine; Its circuit comprises N number of filter inductance L
1, L
2l
n; N number of filter capacitor C
1, C
2c
n; 2N high frequency power switch transistor T
1u, T
2ut
nuand T
1d, T
2dt
ndwith 2N and the antiparallel diode D of high frequency power switching tube
1u, D
2ud
nuand D
1d, D
2dd
nd; A net side filter inductance L and electric capacity C.Connect with net side filter inductance L after the lower brachium pontis of described each half-bridge circuit is together in series successively again with net side filter capacitor C and be attached to direct current network; The brachium pontis two ends of described each half-bridge circuit connect super capacitor monomer by filter unit.This converter can be used in the occasion of high-power energy storage, adopts the voltage of this bidirectional DC-DC converter switching device, current stress little under same power condition, can realize storage and the feedback of direct current energy.
Description
Technical field
The utility model belongs to field of power electronics, is specifically related to a kind of bidirectional DC-DC converter for direct current network energy storage.
Background technology
Along with the rapid consumption of traditional fossil energy (as oil, coal, natural gas etc.); and the increasingly sharpening of the problem such as the world energy sources crisis brought thus and environmental pollution, reasonable development and utilize green regenerative energy sources become the mankind in the urgent need to.For regenerative resource, solar energy power generating, wind power generation and fuel cell power system receive people and more and more pay attention to, and how by these new energy grid-connected powers, be transformed to the electric energy that user can directly utilize, be the main research direction in distributed power generation field.Energy storage device plays the part of vital role in distribution type renewable energy grid-connected system, in order to solve energy storage device in parallel time low-voltage and grid-connected required high voltage between voltage levvl mismatch problem, need to use high voltage large capcity bi-directional DC-DC energy storage converter.
Ultracapacitor is a kind of important energy-storage travelling wave tube, has the features such as power density is large, efficiency for charge-discharge is high, have extended cycle life, absorbs the occasions such as system have a wide range of applications at micro-grid system, generation of electricity by new energy, braking energy.In high pressure, jumbo super capacitor energy-storage application scenario, because storage capacitor monomer (or electric capacity monomer series-connected assembly) voltage is lower, usually need to be connected construction system by multiple monomer or assembly.And super capacitor monolithic element parameter discrete is comparatively large, the system of directly being connected by multiple monomer needs to consider electric voltage equalization problem.
Utility model content
In view of this, the utility model provides a kind of bidirectional DC-DC converter for direct current network energy storage, to be applied to high pressure, Large Copacity energy storage occasion.
The utility model is achieved through the following technical solutions: a kind of bidirectional DC-DC converter for direct current network energy storage, is characterized in that, by LC filter unit, and half-bridge circuit, net side inductance L and net side filter capacitor C combine; This bidirectional DC-DC converter comprises n filter inductance L
1, L
2l
n; N filter capacitor C
1, C
2c
n; 2n high frequency power switch transistor T
1u, T
2ut
nuand T
1d, T
2dt
ndwith 2n and the antiparallel diode D of high frequency power switching tube
1u, D
2ud
nuand D
1d, D
2dd
nd; A net side filter inductance L and electric capacity C; Connect with net side filter inductance L after the lower brachium pontis of described half-bridge circuit is together in series successively again with net side filter capacitor C and be attached to direct current network; The brachium pontis two ends of described half-bridge circuit connect super capacitor monomer by filter unit.
The beneficial effects of the utility model are, can contribute to reducing the contradiction between the low and application scenario voltage height of super capacitor monomer voltage, under same power condition, adopt the voltage of this bidirectional DC-DC converter switching device, current stress little, inductance required under identical output current ripple condition is only the 1/N of single half-bridge topology
2features such as (N are cascade module number), has advantage in high pressure, great power bidirectional transformation of electrical energy occasion.
Accompanying drawing explanation
Fig. 1 is a kind of bidirectional DC-DC converter circuit theory diagrams for direct current network energy storage that the utility model provides.
Fig. 2 (a), (b) are the current path figure under employing the utility model bidirectional DC-DC converter super capacitor energy-storage state.
Fig. 3 (a), (b) are the current path figure under adopting the utility model bidirectional DC-DC converter super capacitor to release energy state.
Embodiment
By reference to the accompanying drawings, preferred embodiment is described in detail.
Fig. 1 is a kind of bidirectional DC-DC converter circuit theory diagrams for direct current network energy storage.Its circuit is by LC filter unit, and half-bridge circuit, nets side inductance L and net side filter capacitor C combines; Wherein bidirectional DC-DC converter has n filter inductance L
1, L
2l
n; N filter capacitor C
1, C
2c
n; 2n high frequency power switch transistor T
1u, T
2ut
nuand T
1d, T
2dt
ndwith 2n and the antiparallel diode D of high frequency power switching tube
1u, D
2ud
nuand D
1d, D
2dd
nd; A net side filter inductance L and electric capacity C; Connect with net side filter inductance L after the lower brachium pontis of described half-bridge circuit is together in series successively again with net side filter capacitor C and be attached to direct current network; The brachium pontis two ends of described half-bridge circuit connect super capacitor monomer by filter unit.
Fig. 2 (a), (b) are the current path figure under employing the utility model bidirectional DC-DC converter super capacitor energy-storage state.When super capacitor group is in energy storage state, bidirectional DC-DC converter is operated in boost mode, the lower brachium pontis switch transistor T of half-bridge module
id, upper brachium pontis diode D
iuand inductance L composition Boost, DC bus side energy trasfer is to super capacitor.According to switch transistor T
idturn-on and turn-off, circuit is divided into two kinds of mode, and mode 1 is as shown in Fig. 2 (a): work as switch transistor T
idduring conducting, the energy of DC bus is along with switch transistor T
idconducting to the transfer of net side inductance L; Mode 2 is as shown in Fig. 2 (b): work as switch transistor T
idduring shutoff, the energy of DC bus and net side inductance L is along with sustained diode
iuconducting be transferred to bank of super capacitors afterwards after filtering.Wherein i=1,2 ... n.
Fig. 3 (a), (b) are the current path figure under adopting the utility model bidirectional DC-DC converter super capacitor to release energy state.When super capacitor group is in and releases energy state, bidirectional DC-DC converter is operated in decompression mode, the upper brachium pontis switch transistor T of half-bridge module
iu, lower brachium pontis diode D
idand inductance L composition Buck converter, the energy trasfer of super capacitor group is to DC bus side.According to switch transistor T
iuturn-on and turn-off, circuit works in two kinds of mode respectively, and mode 1 is as shown in Fig. 3 (a): work as switch transistor T
iuduring conducting, ultracapacitor C
sienergy through filter inductance L
i, switch transistor T
iube transferred to net side inductance L, filter capacitor C and DC bus; Mode 2 is as shown in Fig. 3 (b): work as switch transistor T
iuduring shutoff, the energy of net side inductance L is along with sustained diode
idconducting be transferred to filter capacitor C and DC bus.Wherein i=1,2 ... n.
Claims (1)
1., for a bidirectional DC-DC converter for direct current network energy storage, it is characterized in that, by LC filter unit, half-bridge circuit, net side inductance L and net side filter capacitor C combine; This bi-directional DC-DC variator comprises n filter inductance L
1, L
2l
n; N filter capacitor C
1, C
2c
n; 2n high frequency power switch transistor T
1u, T
2ut
nuand T
1d, T
2dt
ndwith 2n and the antiparallel diode D of high frequency power switching tube
1u, D
2ud
nuand D
1d, D
2dd
nd; A net side filter inductance L and electric capacity C; Connect with net side filter inductance L after the lower brachium pontis of described half-bridge circuit is together in series successively again with net side filter capacitor C and be attached to direct current network; The brachium pontis two ends of described half-bridge circuit connect super capacitor monomer by filter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006842.8U CN204376517U (en) | 2015-01-06 | 2015-01-06 | A kind of bidirectional DC-DC converter for direct current network energy storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006842.8U CN204376517U (en) | 2015-01-06 | 2015-01-06 | A kind of bidirectional DC-DC converter for direct current network energy storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204376517U true CN204376517U (en) | 2015-06-03 |
Family
ID=53332696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520006842.8U Expired - Fee Related CN204376517U (en) | 2015-01-06 | 2015-01-06 | A kind of bidirectional DC-DC converter for direct current network energy storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204376517U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680688A (en) * | 2016-04-10 | 2016-06-15 | 魏腾飞 | Structure and control method of half-bridge bidirectional converter |
| CN106533162A (en) * | 2015-09-14 | 2017-03-22 | 国网智能电网研究院 | Novel DC-DC converter |
| TWI584557B (en) * | 2015-10-26 | 2017-05-21 | 茂達電子股份有限公司 | Energy storage device and control method thereof |
| CN108667104A (en) * | 2018-06-19 | 2018-10-16 | 三峡大学 | A kind of charging of lithium battery group alternating current-direct current and active equalization circuit |
| CN108667058A (en) * | 2018-07-24 | 2018-10-16 | 合肥工业大学 | A kind of system for chain type energy storage structure that can eliminate secondary pulsation |
| CN109792158A (en) * | 2016-08-31 | 2019-05-21 | 通用电气公司 | Mix active power link modular device and relevant system and method |
-
2015
- 2015-01-06 CN CN201520006842.8U patent/CN204376517U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533162A (en) * | 2015-09-14 | 2017-03-22 | 国网智能电网研究院 | Novel DC-DC converter |
| CN106533162B (en) * | 2015-09-14 | 2019-03-08 | 国网智能电网研究院 | A kind of DC/DC converter |
| TWI584557B (en) * | 2015-10-26 | 2017-05-21 | 茂達電子股份有限公司 | Energy storage device and control method thereof |
| CN105680688A (en) * | 2016-04-10 | 2016-06-15 | 魏腾飞 | Structure and control method of half-bridge bidirectional converter |
| CN109792158A (en) * | 2016-08-31 | 2019-05-21 | 通用电气公司 | Mix active power link modular device and relevant system and method |
| CN108667104A (en) * | 2018-06-19 | 2018-10-16 | 三峡大学 | A kind of charging of lithium battery group alternating current-direct current and active equalization circuit |
| CN108667104B (en) * | 2018-06-19 | 2023-08-25 | 三峡大学 | Alternating current-direct current charging and active equalization circuit of lithium battery pack |
| CN108667058A (en) * | 2018-07-24 | 2018-10-16 | 合肥工业大学 | A kind of system for chain type energy storage structure that can eliminate secondary pulsation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20160106 |