CN209233559U - A kind of station station-service direct current system based on MMC - Google Patents
A kind of station station-service direct current system based on MMC Download PDFInfo
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- CN209233559U CN209233559U CN201821488472.6U CN201821488472U CN209233559U CN 209233559 U CN209233559 U CN 209233559U CN 201821488472 U CN201821488472 U CN 201821488472U CN 209233559 U CN209233559 U CN 209233559U
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- 238000005457 optimization Methods 0.000 description 3
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Abstract
The station station-service direct current system based on MMC that the utility model discloses a kind of, including rectifying part and Converting Unit, wherein rectifying part includes battery, MMC type rectifier, fuse, disconnecting switch, and Converting Unit includes MMC type inverter, breaker.MMC type rectifier provides AC power source by two sections of ac bus, and MMC type rectifier is used to convert AC power source to DC power supply, supports DC bus-bar voltage, and for station/station-service DC load power supply, battery is connected by fuse, disconnecting switch and DC bus；MMC type inverter is connected on DC bus.The utility model can guarantee direct current supply power quality under conditions of not needing filtering link, and provide the three-phase alternating-current supply for guaranteeing power quality.
Description
Technical field
The utility model relates to a kind of direct current system, specially a kind of station station-service direct current system based on MMC belongs to defeated change
Electric applied technical field.
Background technique
Stand/station-service direct current system be applied to substation, converter station, power plant, for protection, automatic device, emergency lighting,
Emergency power supply and the operation of breaker switching on and off etc. provide the power-supply system of DC power supply, break down in station/station-service AC system
When, by backup power supply --- battery continues to provide DC power supply, while providing DC power supply for uninterruptible power supply UPS.Therefore,
Stand/station-service direct current system plays a crucial role the safe and stable operation in substation, converter station, power plant.
Station/station-service direct current system mainly uses three bridge arm rectifier of conventional three-phase as charger at present, and by single-phase
The UPS that inverter is constituted, there are input ac power power qualities to influence output DC power supply power quality, UPS can only be provided
Therefore the problem of single phase alternating current power supply, proposes a kind of station station-service direct current system based on MMC regarding to the issue above.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides a kind of station station-service direct current system based on MMC
System can guarantee direct current supply power quality under conditions of not needing filtering link, and provide the three-phase for guaranteeing power quality
AC power source.
The utility model is achieved through the following technical solutions above-mentioned purpose, a kind of station station-service direct current system based on MMC,
Including rectifying part and Converting Unit, wherein the rectifying part includes battery, MMC type rectifier, fuse and keeps apart
It closes, the output end of the battery is connected the input terminal of the fuse, and the output end of the fuse is connected the isolation
The input terminal of switch；
The Converting Unit includes MMC type inverter and breaker, and the MMC type rectifier is connected by two sections of ac bus
Connect, ac bus be exchange one section with exchange two sections；The output end of the disconnecting switch and the output end of breaker are connected to
On one section of DC bus, and one section of DC bus connects two sections of DC bus by MMC type rectifier.
Preferably, one section of the exchange is connected on the MMC type rectifier with exchanging two sections.
Preferably, one section of DC bus connects controller, protector and each ranking score electric screen by breaker respectively.
Preferably, each ranking score electric screen include feed panel, main charging screen, spare charging shield, in battery panel wherein
It is a kind of.
The beneficial effects of the utility model are: the MMC type rectifier of the utility model provides exchange by two sections of ac bus
Power supply, MMC type rectifier are used to convert AC power source to DC power supply, support DC bus-bar voltage, negative for station/station-service direct current
Power supply is carried, battery is connected by fuse, disconnecting switch and DC bus；MMC type inverter is connected on DC bus.This
Utility model can guarantee direct current supply power quality under conditions of not needing filtering link, and provide and guarantee power quality
Three-phase alternating-current supply has good economic benefit and social benefit, is suitble to promote the use of.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram.
In figure: 1, battery, 2, one section of exchange, 3, two sections of exchange, 4, fuse, 5, disconnecting switch, 6, one sections of direct current mothers
Line, 7, MMC type rectifier, 8, breaker, 9, MMC type inverter, 10, two sections of DC bus, 11, controller, 12, protector,
13, each ranking score electric screen.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Refering to Figure 1, a kind of station station-service direct current system based on MMC, including rectifying part and Converting Unit,
In, the rectifying part includes battery 1, MMC type rectifier 7, fuse 4 and disconnecting switch 5, the output of the battery 1
End is connected the input terminal of the fuse 4, and the output end of the fuse 4 is connected the input terminal of the disconnecting switch 5；It is described
Converting Unit includes MMC type inverter 9 and breaker 8, and for the MMC type rectifier 7 by two sections of ac bus connections, exchange is female
Line be exchange one section 2 with exchange two section 3；The output end of the disconnecting switch 5 and the output end of breaker 8 are connected to a Duan Zhi
It flows on bus 6, and one section of DC bus 6 is connected on two sections of DC bus 10 by MMC type rectifier 7.
As a kind of technical optimization scheme of the utility model, it is described exchange one section 2 and exchange two section 3 be connected on described in
On MMC type rectifier 7.
As a kind of technical optimization scheme of the utility model, one section of DC bus 6 is connected by breaker 8 respectively
Controller 11, protector 12 and each ranking score electric screen 13.
As a kind of technical optimization scheme of the utility model, each ranking score electric screen 13 includes feed panel, main charging
Screen, the spare one of which shielded, in battery panel that charges.
When the utility model is used, MMC type rectifier 7 is used to convert AC power source to DC power supply, direct current is supported
Busbar voltage, for station/station-service DC load power supply, battery 1 is connect with DC bus by fuse 4, disconnecting switch 5, is handed over
When flowing power loss, battery 1 supports the voltage of DC bus；MMC type inverter 9 is connected on DC bus, AC power source
When power loss, battery 1 provides DC power supply, and DC power supply is converted AC power source by MMC type inverter 9, to critical station/station-service
AC load carries out uninterrupted power supply, and breaker 8 is used for when station/station-service direct current system breaks down, is referred to according to protection act
It enables and region of breaking down is isolated.Stand/factory's 400V AC power source provides by two sections of ac bus, two sections of ac bus are simultaneously MMC
Type rectifier 7 is powered, and AC power source is converted DC power supply by MMC type rectifier 7, DC bus-bar voltage is supported, for station/station-service
DC load power supply.Battery 1 is connect by fuse 4, disconnecting switch 5 with DC bus, stand/factory's 400V AC power source is normal
When, MMC type rectifier 7 carries out floating charging to battery 1 by DC bus；Stand/factory 400V AC power source power loss when, battery
The voltage of 1 support DC bus.MMC type inverter 9 is connected on DC bus, stand/factory's 400V AC power source it is normal when, MMC
Type inverter 9 is used as critical station/station-service AC load backup power source；Stand/factory 400V AC power source power loss when, battery 1 provide
DC power supply is converted AC power source by DC power supply, MMC type inverter 9, carries out to critical station/station-service AC load uninterrupted
Power supply.Fuse 4 is used to quickly isolate battery 1 with DC bus when internal short circuit fault occurs for battery 1.
Disconnecting switch 5 is used as visual disconnected node.Each ranking score electric screen 13 (such as feed panel, main charging screen, spare charging shield, battery
Screen), protection circuit and control circuit connect with DC bus by breaker 8, breaker 8 is in station/station-service direct current system
When breaking down, region of breaking down is isolated according to protection act instruction.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of station station-service direct current system based on MMC, it is characterised in that: including rectifying part and Converting Unit, wherein described
Rectifying part includes battery (1), MMC type rectifier (7), fuse (4) and disconnecting switch (5), the battery (1) it is defeated
The input terminal of the outlet series connection fuse (4), and the output end series connection disconnecting switch (5) of the fuse (4) is defeated
Enter end；
The Converting Unit includes MMC type inverter (9) and breaker (8), and the MMC type rectifier (7) passes through two sections of exchanges
Bus connection, ac bus are exchange one section (2) and exchange two sections (3)；The output end and breaker of the disconnecting switch (5)
(8) output end is connected on one section of DC bus (6), and one section of DC bus (6) is connected by MMC type rectifier (7)
It connects on two sections of DC bus (10).
2. a kind of station station-service direct current system based on MMC according to claim 1, it is characterised in that: one section of the exchange
(2) with exchange two sections (3) and be connected on the MMC type rectifier (7).
3. a kind of station station-service direct current system based on MMC according to claim 1, it is characterised in that: a Duan Zhiliu
Bus (6) passes through breaker (8) connection controller (11), protector (12) and each ranking score electric screen (13) respectively.
4. a kind of station station-service direct current system based on MMC according to claim 3, it is characterised in that: each ranking score
Electric screen (13) includes feed panel, main charging screen, the spare one of which shielded, in battery panel that charges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488472.6U CN209233559U (en) | 2018-09-12 | 2018-09-12 | A kind of station station-service direct current system based on MMC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488472.6U CN209233559U (en) | 2018-09-12 | 2018-09-12 | A kind of station station-service direct current system based on MMC |
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| Publication Number | Publication Date |
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| CN209233559U true CN209233559U (en) | 2019-08-09 |
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| CN201821488472.6U Expired - Fee Related CN209233559U (en) | 2018-09-12 | 2018-09-12 | A kind of station station-service direct current system based on MMC |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332399A (en) * | 2020-10-23 | 2021-02-05 | 国网湖北省电力有限公司宜昌供电公司 | 220V two-electricity two-charge multi-feed direct current system |
| CN113949087A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Station-service direct-current power bidirectional transmission system |
| CN113949088A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Alternating current and direct current converting system for power plant and factory |
| CN114825410A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Medium-voltage direct-current energy storage system for thermal power plant |
-
2018
- 2018-09-12 CN CN201821488472.6U patent/CN209233559U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332399A (en) * | 2020-10-23 | 2021-02-05 | 国网湖北省电力有限公司宜昌供电公司 | 220V two-electricity two-charge multi-feed direct current system |
| CN112332399B (en) * | 2020-10-23 | 2021-08-10 | 国网湖北省电力有限公司宜昌供电公司 | 220V two-electricity two-charge multi-feed direct current system |
| CN113949087A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Station-service direct-current power bidirectional transmission system |
| CN113949088A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Alternating current and direct current converting system for power plant and factory |
| CN114825410A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Medium-voltage direct-current energy storage system for thermal power plant |
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| CF01 | Termination of patent right due to non-payment of annual fee |