CN109347084B - Direct-current ring main unit circuit structure and use method - Google Patents
Direct-current ring main unit circuit structure and use method Download PDFInfo
- Publication number
- CN109347084B CN109347084B CN201811482478.7A CN201811482478A CN109347084B CN 109347084 B CN109347084 B CN 109347084B CN 201811482478 A CN201811482478 A CN 201811482478A CN 109347084 B CN109347084 B CN 109347084B
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- direct current
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- bus
- wires
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000010248 power generation Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/108—Parallel operation of dc sources using diodes blocking reverse current flow
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a circuit structure of a direct current ring main unit, which comprises a positive bus, a negative bus, a bus grounding wire, a plurality of positive direct current wires, a plurality of negative direct current wires and a plurality of grounding wires, wherein the positive direct current wires are connected in parallel with the positive bus, the negative direct current wires are connected in parallel with the negative bus, the grounding wires are connected in parallel with the bus grounding wire, and diodes which are in unidirectional conduction are connected in series with the positive direct current wires and the negative direct current wires. The method solves the problem that the negative and positive poles of small miniature power generation equipment of a direct current power grid are reversely connected to influence the power grid.
Description
Technical Field
The invention relates to the field of power equipment, in particular to a direct current ring main unit circuit structure and a using method thereof.
Background
The direct current power grid has the characteristics of energy conservation and high efficiency, is the development direction of a future power grid, has good characteristics of supporting a distributed power grid, has directivity, and is mainly in families, and small micro power generation equipment in the distributed power grid can influence the power grid once the positive electrode and the negative electrode of the equipment are connected reversely.
Disclosure of Invention
The invention aims to solve the technical problems that: the circuit structure of the direct current ring main unit is provided for solving the problem that the reverse connection of the positive and negative poles of small miniature power generation equipment of a direct current power grid can influence the power grid.
The technical scheme of the invention is as follows: the utility model provides a direct current looped netowrk cabinet circuit structure, includes positive busbar, negative busbar, busbar earth connection, a plurality of positive direct current line, a plurality of negative direct current line and a plurality of earth connection, positive direct current line connects in parallel on the positive busbar, and negative direct current line connects in parallel on the negative busbar, and the earth connection connects in parallel on the busbar earth connection, has the diode of unidirectional connection on positive direct current line and the negative direct current line in series.
Further, diodes on the positive direct current line and the negative direct current line are connected in parallel with an RC circuit.
Further, switches are connected in series on the positive direct current line, the negative direct current line and the ground line.
Furthermore, an emergency conversion line is arranged between the positive bus and the negative bus, a switch is connected in series on the emergency conversion line, and the diode can be reversely inserted.
The method for using the direct current ring main unit circuit structure comprises the following steps,
S1, reversely plugging a diode on a wireless line;
s2, closing a switch connected in series on the emergency conversion line.
The beneficial effects of the invention are as follows:
Compared with the prior art, the invention has the advantages that the diodes which are connected in series and are conducted in one way on the positive direct current line and the negative direct current line are used for isolating the influence of the positive and negative electrode connection of the small miniature power generation equipment on the power grid. The invention has simple structure and is particularly suitable for the circuit structure of the direct current ring main unit.
Drawings
FIG. 1 is a circuit wiring diagram of a receptacle of the present invention;
In the figure: 1 positive bus, 2 bus grounding wire, 3 negative bus, 4 positive direct current wire, 5 grounding wire, 6 negative direct current wire, 7 diode, 8 power generation device, 9 RC circuit, 10 emergency conversion wire.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples:
Referring to fig. 1, a circuit structure of a direct current ring main unit comprises a positive bus 1, a negative bus 3, a bus grounding wire 2, a plurality of positive direct current wires 4, a plurality of negative direct current wires 6 and a plurality of grounding wires 5, wherein the positive direct current wires 4 are connected in parallel with the positive bus 1, the negative direct current wires 6 are connected in parallel with the negative bus 3, the grounding wires 5 are connected in parallel with the bus grounding wire 2, and a diode 7 which is in unidirectional conduction is connected in series with the positive direct current wires 4 and the negative direct current wires 6. When the positive electrode and the negative electrode of the power generation device 8 between the positive direct current wire 4, the negative direct current wire 6 and the grounding wire 5 are reversely connected, the diode 7 can only be conducted in one direction, and the electricity generated by the power generation device 8 can not be conducted to the bus, so that the influence of the reverse connection of the power generation device 8 on a power grid is avoided.
Further, the diodes 7 on the positive direct current line 4 and the negative direct current line 6 are connected in parallel with an RC circuit 9. The RC circuit 9 has the ability to conduct the abrupt voltage and thus acts as a protection diode 7.
Further, switches are connected in series with the positive direct current line 4, the negative direct current line 6 and the ground line 5. The switch can control the connection and disconnection of the positive direct current wire 4, the negative direct current wire 6 and the grounding wire 5 at any time, so that the circuit can be conveniently overhauled, and the circuit can be cut off at any time in case of fire.
Further, an emergency switching line 10 is arranged between the positive bus 1 and the negative bus 3, a switch is connected in series on the emergency switching line 10, and the diode 7 can be connected in a reverse plug-in mode. When one of the positive bus bar 1 and the negative bus bar 3 is not powered, the load connected between the positive direct current wire 4 and the ground wire 5 or between the negative direct current wire 6 and the ground wire 5 is powered off, and at the moment, one of the positive bus bar 1 and the negative bus bar 3 can be temporarily used as an emergency by switching on the switch of the emergency switching wire 10 and reversely plugging the diode 7 on the unpowered one wire.
The method for using the direct current ring main unit circuit structure comprises the following steps,
S1, reversely plugging a diode 7 on a wireless line;
S2, closing a switch connected in series on the emergency conversion line 10.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (3)
1. The application method of the direct current ring main unit circuit structure is characterized by comprising the following steps of: the direct current ring main unit circuit structure comprises a positive bus (1), a negative bus (3), a bus grounding wire (2), a plurality of positive direct current wires (4), a plurality of negative direct current wires (6) and a plurality of grounding wires (5), wherein the positive direct current wires (4) are connected in parallel to the positive bus (1), the negative direct current wires (6) are connected in parallel to the negative bus (3), the grounding wires (5) are connected in parallel to the bus grounding wire (2), and a diode (7) which is in unidirectional conduction is connected in series to the positive direct current wires (4) and the negative direct current wires (6);
An emergency conversion line (10) is arranged between the positive bus (1) and the negative bus (3), a switch is connected in series on the emergency conversion line (10), and the diode (7) can be reversely connected in an inserting mode;
The method comprises the steps of,
S1, reversely plugging a diode (7) on a wireless line;
s2, closing a switch connected in series on the emergency conversion line (10).
2. The method for using the circuit structure of the direct current ring main unit according to claim 1, wherein the method comprises the following steps: and the diodes (7) on the positive direct current line (4) and the negative direct current line (6) are connected in parallel with an RC circuit (9).
3. The method for using the circuit structure of the direct current ring main unit according to claim 1, wherein the method comprises the following steps: and the positive direct current wire (4), the negative direct current wire (6) and the grounding wire (5) are connected in series with a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482478.7A CN109347084B (en) | 2018-12-05 | 2018-12-05 | Direct-current ring main unit circuit structure and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482478.7A CN109347084B (en) | 2018-12-05 | 2018-12-05 | Direct-current ring main unit circuit structure and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109347084A CN109347084A (en) | 2019-02-15 |
| CN109347084B true CN109347084B (en) | 2024-04-23 |
Family
ID=65320001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811482478.7A Active CN109347084B (en) | 2018-12-05 | 2018-12-05 | Direct-current ring main unit circuit structure and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109347084B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203504305U (en) * | 2013-10-21 | 2014-03-26 | 常熟开关制造有限公司(原常熟开关厂） | Photovoltaic direct current cabinet |
| CN205753399U (en) * | 2015-11-03 | 2016-11-30 | 珠海格力电器股份有限公司 | Photovoltaic power generation system and air conditioner |
| CN107482523A (en) * | 2017-09-21 | 2017-12-15 | 中国能源建设集团广东省电力设计研究院有限公司 | Double bus scheme GIS device and its repair method, pressure test method |
| CN206807129U (en) * | 2016-12-12 | 2017-12-26 | 哈红 | A kind of high security ring main unit on-pole switch 48V DC power-supply systems |
| CN209046257U (en) * | 2018-12-05 | 2019-06-28 | 贵州电网有限责任公司 | A kind of direct current ring network cabinet circuit structure |
-
2018
- 2018-12-05 CN CN201811482478.7A patent/CN109347084B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203504305U (en) * | 2013-10-21 | 2014-03-26 | 常熟开关制造有限公司(原常熟开关厂） | Photovoltaic direct current cabinet |
| CN205753399U (en) * | 2015-11-03 | 2016-11-30 | 珠海格力电器股份有限公司 | Photovoltaic power generation system and air conditioner |
| CN206807129U (en) * | 2016-12-12 | 2017-12-26 | 哈红 | A kind of high security ring main unit on-pole switch 48V DC power-supply systems |
| CN107482523A (en) * | 2017-09-21 | 2017-12-15 | 中国能源建设集团广东省电力设计研究院有限公司 | Double bus scheme GIS device and its repair method, pressure test method |
| CN209046257U (en) * | 2018-12-05 | 2019-06-28 | 贵州电网有限责任公司 | A kind of direct current ring network cabinet circuit structure |
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| Publication number | Publication date |
|---|---|
| CN109347084A (en) | 2019-02-15 |
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