CN204538700U - A kind of independent micro-grid electric power system - Google Patents
A kind of independent micro-grid electric power system Download PDFInfo
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- CN204538700U CN204538700U CN201520173946.8U CN201520173946U CN204538700U CN 204538700 U CN204538700 U CN 204538700U CN 201520173946 U CN201520173946 U CN 201520173946U CN 204538700 U CN204538700 U CN 204538700U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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Abstract
The utility model provides a kind of independent micro-grid electric power system, and independent micro-grid electric power system is divided into different feeder zone; Master control power acquisition, with concentrating access way, is connected from different feeder zone through transformer; Also comprise renewable energy power generation machine and energy storage device, be arranged on the connected bus of high voltage side of transformer or be arranged on inside, feeder zone.This system configuration can improve independent micro-grid power supply reliability, and can assess the reliability of independent micro-grid electric power system more accurately.
Description
Technical field
The utility model relates to a kind of independent micro-grid electric power system.
Background technology
Along with the continuous growth of energy demand, greenhouse effect are further obvious, utilize the renewable energy power generation technology of wind energy, solar energy etc. to become rapidly the important means of the current reply energy and environmental crisis.Polytype distributed generation unit can be combined by independent micro-grid electric power system, effectively realizes various energy resources complementation, improves energy utilization rate and the power supply reliability of whole system.In remote and Island, independent micro-grid electric power system is one of effective means solving its powerup issue.
Regenerative resource often has randomness, intermittent feature.In the planning and designing of independent micro-grid electric power system, while making full use of regenerative resource, how to ensure that the power supply reliability of system is one of key issue needing to pay close attention to.Usually just using the reliability index of capacity unbalance degree as system in existing planing method.For further considering that equipment fault affects, needing in planning and designing, add reliability assessment link, adopting the reliability level of suitable reliability estimation method evaluation system.
But the reliability of current independent microgrid system is basic in powering only carries out the method for supplying power to after reliability assessment around the generating in autonomous system-load capacity balance, can not meet the planning and designing demand of independent micro-grid.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of can assessment the reliability of independent micro-grid electric power system more accurately, and improves the independent micro-grid electric power system of power supply reliability.
Along with the increase of independent microgrid system scale, the impact of grid structure also should be considered in reliability assessment, in existing independent microgrid system Reliability Evaluation, do not consider the impact that equipment fault brings, because grid structure is complicated, load bus is more, middle pressure independent microgrid system is structurally closer to the distribution system containing distributed power source.But unlike, the distribution system containing distributed power source is incorporated into the power networks for a long time, and independent microgrid system is in from net state all the time, needs to rely on the power supply in microgrid to realize power balance completely.The voltage problem that this feature determines middle pressure independent microgrid system is more more outstanding than distribution system, and due to higher resistive in distribution line, therefore voltage is simultaneously by the double influence of active balance and reactive balance.And in this, existing method all only considers intrasystem active balance, the voltage problem that have ignored reactive balance in system and bring.
The technical solution adopted in the utility model is as follows: a kind of independent micro-grid electric power system, is characterized in that: independent micro-grid electric power system is divided into different feeder zone; Master control power acquisition, with concentrating access way, is connected from different feeder zone through transformer; Also comprise renewable energy power generation machine and energy storage device, be arranged on the connected bus of high voltage side of transformer or be arranged on inside, feeder zone.
As preferably, also comprise automatic safety device, be arranged on high voltage side of transformer and feeder zone entrance, for the connection in disengagement failure region automatic during fault and other region of electric power system.
As preferably, also comprise Manual isolation switch, be arranged in the branch of electric power system grid structure, for operating the excision of corresponding load point.
As preferably, described master control power supply is non-renewable energy resources generator and or energy storage device.
As preferably, described renewable energy power generation machine is wind-driven generator.
As preferably, described non-renewable energy resources generator is diesel engine generator.
As preferably, energy storage device is batteries to store energy device.
Compared with prior art, the beneficial effects of the utility model are: this system configuration can improve independent micro-grid power supply reliability, and can assess the reliability of independent micro-grid electric power system more accurately.
Accompanying drawing explanation
Fig. 1 is the system configuration schematic diagram of the utility model wherein embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
As shown in Figure 1, a kind of independent micro-grid electric power system, is divided into different feeder zone by independent micro-grid electric power system; In this specific embodiment, renewable energy power generation machine is wind-driven generator, and non-renewable energy resources generator is diesel engine generator; Diesel engine generator as system master power supply adopts concentrates access way, is connected from different feeder zone through transformer; Wind-driven generator WT and energy storage device EA(in this specific embodiment for batteries to store energy device) be arranged on bus that high voltage side of transformer is connected or be arranged on inside, feeder zone (being arranged on inside, feeder zone in this specific embodiment).
In this specific embodiment, consider the line fault in transformer fault and feeder zone, automatic safety device is all equipped with in high voltage side of transformer and porch, feeder zone.When an error occurs, automatic safety device can detect intrasystem irregular operating state in time, by the connection in the rapid disengagement failure region of trip operation and other region of system, thus realizes the isolation of fault zone.
In this specific embodiment, inside, each feeder zone is tree network, and root node is connected with area entry place automatic safety device, in the Heavenly Stems and Earthly Branches that load point is dispersed in network and branch.Some branch of tree network is provided with Manual isolation switch, can support that the excision of corresponding load point operates, but inside, each feeder line district is not containing automatic safety device.
High voltage side of transformer and porch, each feeder zone are equipped with automatic safety device.Under this structure; all elements in feeder zone are all in the protection range of its porch automatic safety device; when in region during any element failure, rapid action makes whole feeder zone isolate by corresponding automatic safety device, thus causes all loads in this region to have a power failure.When certain region is isolated, in this region, the power supply of all renewable energy power generation equipment and energy storage device all will be cut off.In sum, in system, the fault of circuit all can be equivalent to the fault in respective feed connection region arbitrarily, thus modeling integrally can be carried out in feeder zone, effectively to reduce the time of fault sampling.For the independent micro-grid electric power system shown in Fig. 1, whole system can be divided into 4 regions according to the position of automatic safety device.Area 0 is the master control power supply area that diesel engine generator and transformer form, and region 1 ~ 3 is different load area.
When fault-free in system occurs, connected region is whole middle pressure independent micro-grid electric power system.When fault occurs in area 0 (transformer fault), all diesel engine generators are all out of service, and connected region is region 1,2,3, and energy storage device is using the temporary transient master control power supply as system.When fault occurs in zone 1, separation generator and energy storage device are all out of service, and connected region is area 0,2,3.When fault occurs in region 2 (or region 3), connected region is 0,1,3 (or 0,1,2), and diesel engine generator will cooperatively interact with wind-driven generator, energy storage device, to fault-free block supply.
Claims (7)
1. an independent micro-grid electric power system, is characterized in that: independent micro-grid electric power system is divided into different feeder zone; Master control power acquisition, with concentrating access way, is connected from different feeder zone through transformer; Also comprise renewable energy power generation machine and energy storage device, be arranged on the connected bus of high voltage side of transformer or be arranged on inside, feeder zone.
2. independent micro-grid electric power system according to claim 1, is characterized in that: also comprise automatic safety device, is arranged on high voltage side of transformer and feeder zone entrance, for the connection in disengagement failure region automatic during fault and other region of electric power system.
3. independent micro-grid electric power system according to claim 1 and 2, is characterized in that: also comprise Manual isolation switch, is arranged in the branch of electric power system grid structure, for operating the excision of corresponding load point.
4. independent micro-grid electric power system according to claim 1, is characterized in that: described master control power supply is non-renewable energy resources generator and or energy storage device.
5. independent micro-grid electric power system according to claim 1, is characterized in that: described renewable energy power generation machine is wind-driven generator.
6. independent micro-grid electric power system according to claim 4, is characterized in that: described non-renewable energy resources generator is diesel engine generator.
7. independent micro-grid electric power system according to claim 1, is characterized in that: energy storage device is batteries to store energy device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520173946.8U CN204538700U (en) | 2015-03-26 | 2015-03-26 | A kind of independent micro-grid electric power system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520173946.8U CN204538700U (en) | 2015-03-26 | 2015-03-26 | A kind of independent micro-grid electric power system |
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| CN204538700U true CN204538700U (en) | 2015-08-05 |
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| CN201520173946.8U Expired - Fee Related CN204538700U (en) | 2015-03-26 | 2015-03-26 | A kind of independent micro-grid electric power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701842A (en) * | 2015-03-26 | 2015-06-10 | 中国电力工程顾问集团西南电力设计院有限公司 | Independent micro-grid power supply system and power supply reliability evaluation method |
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2015
- 2015-03-26 CN CN201520173946.8U patent/CN204538700U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701842A (en) * | 2015-03-26 | 2015-06-10 | 中国电力工程顾问集团西南电力设计院有限公司 | Independent micro-grid power supply system and power supply reliability evaluation method |
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| Date | Code | Title | Description |
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| 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: 20150805 Termination date: 20180326 |
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| CF01 | Termination of patent right due to non-payment of annual fee |