CN202586339U - Direct current microgrid - Google Patents
Direct current microgrid Download PDFInfo
- Publication number
- CN202586339U CN202586339U CN 201220223659 CN201220223659U CN202586339U CN 202586339 U CN202586339 U CN 202586339U CN 201220223659 CN201220223659 CN 201220223659 CN 201220223659 U CN201220223659 U CN 201220223659U CN 202586339 U CN202586339 U CN 202586339U
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- converter
- direct current
- frequency inverter
- power
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Abstract
The utility model provides a direct current microgrid. The direct current microgrid includes an unidirectional DC/DC converter, bidirectional AC/DC converters, a bidirectional DC/DC converter, a DC/AC power frequency inverter and a DC/AC high frequency inverter which are connected in parallel to a direct current bus; the unidirectional DC/DC converter is connected with a photovoltaic power source; the bidirectional AC/DC converters are connected with an alternating current large power grid; the bidirectional DC/DC converter is connected with a storage battery; the DC/AC power frequency inverter is connected with an alternating current load; and the DC/AC high frequency inverter is connected with the AC/DC converters by a non-contact type electricity-taking device, and the AC/DC converters are connected with direct current loads. According to the direct current microgrid provided by the utility model which is of structural simplicity, each distributed power source and loads are all connected into a direct current network; and the direct current microgrid is advantageous in easiness in control, reduced power electronic components, decreased loss in conversion from the power sources to the loads, improved power supply efficiency as well as energy-saving and environmentally-friendly property.
Description
Technical field
The utility model belongs to the power technology field, the little electrical network of particularly a kind of direct current.
Background technology
Mostly present little electrical network is the AC type network; The little electrical network of this interchange is had relatively high expectations for the control of each distributed power source; They need be distinguished inversion and need consider a plurality of factors such as frequency, voltage and power simultaneously; Use many inverters to increase transition loss and cost simultaneously, reduced power supplying efficiency.
The utility model content
To the problem that background technology exists, the utility model provides a kind of direct current little electrical network.
For solving the problems of the technologies described above, the utility model adopts following technical scheme.
The little electrical network of a kind of direct current comprises the unidirectional DC/DC converter that is connected in parallel respectively on the dc bus, two-way AC/DC converter, two-way DC/DC converter, DC/AC power frequency inverter, DC/AC high-frequency inverter; Unidirectional DC/DC converter is connected with photo-voltaic power supply; Two-way AC/DC converter is connected with and exchanges big electrical network; Two-way DC/DC converter is connected with storage battery; DC/AC power frequency inverter connects AC load; The DC/AC high-frequency inverter is connected with the AC/DC converter through contactless electricity getting device, and the AC/DC converter is connected with DC load.
Optimal technical scheme as the utility model has:
Described DC/AC high-frequency inverter is connected with plural AC/DC converter through contactless electricity getting device, and each AC/DC converter is connected with DC load respectively.
Described contactless electricity getting device comprises noncontact electromagnetic coupled transformer, rectifier filter, the Buck circuit that links to each other successively.
When using the utility model, unidirectional DC/DC converter, two-way AC/DC converter, two-way DC/DC converter, DC/AC power frequency inverter, DC/AC high-frequency inverter are connected with the microgrid controller respectively.The operational mode of the utility model is: when the big electrical network of interchange normally moves; Mainly by the photo-voltaic power supply powering load; Exchange big electrical network and can replenish the difference between photo-voltaic power supply energy output and the actual load demand, more than needed if the photo-voltaic power supply energy output has, then return major network through two-way AC/DC inversion; If remaining battery capacity is less, charge a battery by dc bus; Break down when exchanging big electrical network, during the microgrid isolated operation, mainly by the photo-voltaic power supply powering load, storage battery can replenish the difference between photo-voltaic power supply energy output and the actual load demand.
Compared with prior art, the utlity model has following advantage and beneficial effect:
1, the utility model is simple in structure, and each distributed power source and load thereof all insert DC network, are easy to control, have saved power electronic device, have reduced transition loss and the production cost from the power supply to the load, have improved power supplying efficiency simultaneously, energy-conserving and environment-protective.
2, the contactless electricity getting device that adopts of the utility model can make electric energy directly transmit under the situation of contact at no metallic conductor, thus avoided lead in a jumble, the problem of contact sparking, easy to carry and store.
3, the utility model can be the load charging that has different specified charging voltages more than two simultaneously, and is practical.
Description of drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is a contactless electricity getting device structural representation in the utility model.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is described further.
Shown in accompanying drawing, the utility model comprises the unidirectional DC/DC converter that is connected in parallel respectively on the dc bus, two-way AC/DC converter, two-way DC/DC converter, DC/AC power frequency inverter, DC/AC high-frequency inverter; Unidirectional DC/DC converter is connected with photo-voltaic power supply; Two-way AC/DC converter is connected with and exchanges big electrical network; Two-way DC/DC converter is connected with storage battery; DC/AC power frequency inverter connects AC load; The DC/AC high-frequency inverter is connected with the AC/DC converter through contactless electricity getting device, and the AC/DC converter is connected with DC load; The DC/AC high-frequency inverter is connected with three AC/DC converters through contactless electricity getting device in the present embodiment, and each AC/DC converter is connected with DC load respectively, and the voltage of three AC/DC converter outputs is respectively 5V, 20V, 24V; Contactless electricity getting device comprises noncontact electromagnetic coupled transformer, rectifier filter, the Buck circuit that links to each other successively.
Claims (3)
1. the little electrical network of direct current is characterized in that comprising: be connected in the unidirectional DC/DC converter on the dc bus, two-way AC/DC converter, two-way DC/DC converter, DC/AC power frequency inverter, DC/AC high-frequency inverter respectively in parallel; Unidirectional DC/DC converter is connected with photo-voltaic power supply; Two-way AC/DC converter is connected with and exchanges big electrical network; Two-way DC/DC converter is connected with storage battery; DC/AC power frequency inverter connects AC load; The DC/AC high-frequency inverter is connected with the AC/DC converter through contactless electricity getting device, and the AC/DC converter is connected with DC load.
2. the little electrical network of a kind of direct current according to claim 1 is characterized in that: described DC/AC high-frequency inverter is connected with plural AC/DC converter through contactless electricity getting device, and each AC/DC converter is connected with DC load respectively.
3. the little electrical network of a kind of direct current according to claim 1 and 2 is characterized in that: described contactless electricity getting device comprises noncontact electromagnetic coupled transformer, rectifier filter, the Buck circuit that links to each other successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223659 CN202586339U (en) | 2012-05-18 | 2012-05-18 | Direct current microgrid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220223659 CN202586339U (en) | 2012-05-18 | 2012-05-18 | Direct current microgrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586339U true CN202586339U (en) | 2012-12-05 |
Family
ID=47255707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220223659 Expired - Fee Related CN202586339U (en) | 2012-05-18 | 2012-05-18 | Direct current microgrid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202586339U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248066A (en) * | 2013-05-21 | 2013-08-14 | 华北电力大学 | Direct current micro grid topology design method based on DC-DC (Direct Current-Direct Current) sectionalizers |
| CN104253475A (en) * | 2014-09-11 | 2014-12-31 | 国家电网公司 | Off-grid photovoltaic VRLAB (Valve Regulated Lead Acid Battery) energy storage control device and working method thereof |
| CN105226921A (en) * | 2015-10-15 | 2016-01-06 | 珠海格力电器股份有限公司 | Isolated form DC/DC controller, reversible transducer control system and control method |
| CN105932716A (en) * | 2013-09-10 | 2016-09-07 | 中车株洲电力机车研究所有限公司 | Power supply system of distributed type power source |
-
2012
- 2012-05-18 CN CN 201220223659 patent/CN202586339U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248066A (en) * | 2013-05-21 | 2013-08-14 | 华北电力大学 | Direct current micro grid topology design method based on DC-DC (Direct Current-Direct Current) sectionalizers |
| CN105932716A (en) * | 2013-09-10 | 2016-09-07 | 中车株洲电力机车研究所有限公司 | Power supply system of distributed type power source |
| CN104253475A (en) * | 2014-09-11 | 2014-12-31 | 国家电网公司 | Off-grid photovoltaic VRLAB (Valve Regulated Lead Acid Battery) energy storage control device and working method thereof |
| CN105226921A (en) * | 2015-10-15 | 2016-01-06 | 珠海格力电器股份有限公司 | Isolated form DC/DC controller, reversible transducer control system and control method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20160518 |