CN103580264B - A kind of direct current micro-grid system powered with looped network form - Google Patents
A kind of direct current micro-grid system powered with looped network form Download PDFInfo
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- CN103580264B CN103580264B CN201310508459.8A CN201310508459A CN103580264B CN 103580264 B CN103580264 B CN 103580264B CN 201310508459 A CN201310508459 A CN 201310508459A CN 103580264 B CN103580264 B CN 103580264B
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- looped network
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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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- Supply And Distribution Of Alternating Current (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention provides a kind of direct current micro-grid system powered with looped network form, including: the looped network shape dc bus of different electric pressures, the hybrid tie breaker being connected between bus section, busbar section, and it is connected to the photovoltaic generating system on this dc bus, accumulation power supply, internal combustion engine, changer, DC load, AC load；Accumulation power supply is connected from the looped network shape dc bus of different electric pressures by changer with photovoltaic generating system；The action when a certain section of circuit of dc bus breaks down of mixing type current-limiting chopper, by its solid-state switch disjunction trouble point；Internal combustion engine is connected from the looped network shape dc bus of different electric pressures by changer, and when mixing type current-limiting breaker actuation, DC load and AC load for direct current micro-grid system provide stand-by power supply.The direct current micro-grid system of the present invention is powered with looped network form, when a circuit part breaks down, and mixing type current-limiting chopper timely action isolated fault position, it is to avoid large area blackout.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of direct current micro-grid system powered with looped network form.
Background technology
Microgrid refers to by distributed power source, energy storage device, energy converter, associated loadings and monitoring, guarantor
Small-sized the distribution system that protection unit collects, is one and is capable of self-contr ol, protects and manage
Autonomous system, both can be incorporated into the power networks with bulk power grid, it is also possible to island mode runs.
At present, microgrid is mainly presented in exchange microgrid.Comparing with exchanging microgrid, direct-current micro-grid is not
Needing to be tracked the phase and frequency of voltage, reliability is greatly improved, thus is more suitable for DER with negative
The access carried.In theory, direct-current micro-grid only needs one-level current transformer just can conveniently realize and DER and load
Connection, there is higher transformation efficiency；Simultaneously unidirectional current in transmitting procedure without the concern for distribution line
The quadergy that eddy-current loss and circuit absorb, line loss is reduced.But direct-current micro-grid electric power system
May result in whole piece circuit stop power supply when a circuit part breaks down, power supply reliability is low.
In microgrid, usually use the generating of solar energy, wind energy, the energy storage distributed energy as power supply,
In these electricity generation systems, solar electrical energy generation and energy storage are directly to produce direct current energy, although wind power generation is from sending out
The output of motor port is AC energy, but needs to be rectified into direct current energy.These direct current energies need to pass through
Inverter is converted to AC energy, is just available for load and uses.And in present a lot of electrical equipments, first handing over
Stream electric energy becomes direct current energy, then process further to direct current energy.Visible, generate electricity at the energy in a distributed manner
It is that in main micro-grid system, the intermediate link of some AC-DC conversion can be saved.
Invention entitled " a kind of three-wire system direct current micro-grid system being applicable to modern building and control method thereof "
Chinese patent disclose a kind of direct current micro-grid system structure, the most as shown in Figure 1:
This direct current micro-grid system include a DC three-wire system distribution line, diesel-driven generator, at least one
The photovoltaic power generation apparatus of individual band corresponding DC/DC current transformer, one group of energy storage battery and corresponding DC/DC thereof
Current transformer, the DC/DC current transformer of at least one band respective straight current load, at least one carry corresponding single phase industrial frequence
The DC/AC inverter of AC load, the adjustable DC/AC of frequency amplitude of a band respective three-phase AC load
Inverter, one access the three-phase AC/DC rectification/inverter of bulk power grid, balance of voltage device, one
Microgrid control system.
In direct current micro-grid system disclosed in prior art, system work nominal rated voltage is 750V, and uses
Bavin outbreak is power backup.This system voltage is higher ranked, when being powered to DC load, need through
Cross repeatedly energy conversion, and when a certain circuit breaks down, it is impossible to ensure the normal power supply of load, this
Run duration sent out by outer bavin, and this system can cause certain environmental pollution.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of direct current micro-grid system powered with looped network form,
Including: the looped network shape dc bus of different electric pressures, it is connected to the bus section, busbar section of described looped network shape dc bus
Between hybrid tie breaker, and be connected to the photovoltaic generating system on this looped network shape dc bus,
Accumulation power supply, internal combustion engine, changer, DC load, AC load；
Described accumulation power supply and photovoltaic generating system are respectively by described changer and described different electric pressures
Looped network shape dc bus is connected, and powers for described direct current micro-grid system；
Described mixing type current-limiting chopper is when a certain section of circuit of described looped network shape dc bus breaks down
Action, by its solid-state switch disjunction trouble point；
Described internal combustion engine is connected from the looped network shape dc bus of described different electric pressures by described changer,
When described mixing type current-limiting breaker actuation, for DC load and the AC load of described direct current micro-grid system
Stand-by power supply is provided.
Wherein, described changer includes: three-phase DC/AC changer, two-way AC/DC changer, two-way
DC/DC changer, unidirectional DC/DC changer, unidirectional DC/AC changer, unidirectional AC/DC convert
Device；
Described photovoltaic generating system is by described unidirectional DC/DC changer and described looped network shape dc bus phase
Even；
Described accumulation power supply is connected with described looped network shape dc bus by described two-way DC/DC changer；
Described internal combustion engine is by described two-way AC/DC changer and/or unidirectional AC/DC changer and described ring
Netted dc bus is connected.
Wherein, described DC load is two groups, often organizes and has two DC loads respectively, and each DC load is led to
Cross unidirectional DC/DC changer to be connected from the looped network shape dc bus of described different electric pressures.
Wherein, described AC load includes three-phase alternating current load and single phase industrial frequence AC load；Described three intersect
Current load is connected with described looped network shape dc bus by described three-phase DC/AC changer；Described single phase industrial frequence
AC load is connected with described looped network shape dc bus by described unidirectional DC/AC changer.
Wherein, the electric pressure of described looped network shape dc bus is respectively 240V and 480V.
Wherein, described direct current micro-grid system also includes and described unidirectional DC/DC changer and described two-way
The EMS that DC/DC changer connects.
Wherein, described accumulation power supply is accumulator.
Implementing the present invention, this direct current micro-grid system is powered with looped network form, and system considers the most most
DC load need for electricity, reasonable distribution power load, and when a circuit part breaks down, mixing
Formula current limiting circuit breaker timely action isolated fault position, it is to avoid large area blackout, General Promotion electricity consumption can
By property, versatility is higher.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is direct current micro-grid system schematic diagram in prior art；
Fig. 2 is the schematic diagram of the direct current micro-grid system embodiment one powered with looped network form that the present invention provides；
Fig. 3 is the schematic diagram of the direct current micro-grid system embodiment two powered with looped network form that the present invention provides.
Detailed description of the invention
In the direct current micro-grid system powered with looped network form that the present invention provides, the mark of DC micro power grid system
Rated voltage is claimed to be set as ± 240V.In DC micro power grid system structure, bulk power grid, photovoltaic, energy storage electricity
Source is as electric power system, and wherein in system is run, the generated energy of photovoltaic stores up when can fully meet workload demand
The part that can also serve as load is charged to energy storage by photovoltaic, and internal combustion engine is as stand-by power supply, works as bulk power grid
Open internal combustion engine when fault or workload demand are bigger and compensate residue electric load.Thered is provided not by unidirectional DC/DC
With the DC load of electric pressure, provide the load electricity consumption of domestic 220V AC single phase by AC/DC.
Concrete, refer to Fig. 2, provide a kind of direct current micro-grid system powered with looped network form for the present invention,
Comprising: the looped network shape dc bus of different electric pressures, it is connected to the bus of described looped network shape dc bus
Hybrid tie breaker between Duan, and be connected to the photovoltaic generating system on this looped network shape dc bus,
Accumulation power supply, internal combustion engine, changer, DC load, AC load；
Described accumulation power supply and photovoltaic generating system are respectively by described changer and described different electric pressures
Looped network shape dc bus is connected, and powers for described direct current micro-grid system；
Described mixing type current-limiting chopper is when a certain section of circuit of described looped network shape dc bus breaks down
Action, by its solid-state switch disjunction trouble point；
Described internal combustion engine is connected from the looped network shape dc bus of described different electric pressures by described changer,
When described mixing type current-limiting breaker actuation, for DC load and the AC load of described direct current micro-grid system
Stand-by power supply is provided.
In concrete implementation, described changer includes: three-phase DC/AC changer, two-way AC/DC convert
Device, two-way DC/DC changer, unidirectional DC/DC changer, unidirectional DC/AC changer, unidirectional AC/DC
Changer；
Described photovoltaic generating system is by described unidirectional DC/DC changer and described looped network shape dc bus phase
Even；
Described accumulation power supply is connected with described looped network shape dc bus by described two-way DC/DC changer；
Described internal combustion engine is by described two-way AC/DC changer and/or unidirectional AC/DC changer and described ring
Netted dc bus is connected.
Wherein, described DC load is two groups, often organizes and has two DC loads respectively, and each DC load is led to
Cross unidirectional DC/DC changer to be connected from the looped network shape dc bus of described different electric pressures.
Wherein, described AC load includes three-phase alternating current load and single phase industrial frequence AC load；Described three intersect
Current load is connected with described looped network shape dc bus by described three-phase DC/AC changer；Described single phase industrial frequence
AC load is connected with described looped network shape dc bus by described unidirectional DC/AC changer.
Wherein, the electric pressure of described looped network shape dc bus is respectively 240V and 480V.
As it is shown on figure 3, described direct current micro-grid system also includes and described unidirectional DC/DC changer and described double
The EMS connected to DC/DC changer.
The present invention proposes ± 240V direct current micro-grid system structure.This system compares existing direct current micro-grid system,
System in the present invention is powered with looped network form, and using internal combustion engine as the stand-by power supply of system, when a certain line
Time breaking down in road, the rapid action of mixing type current-limiting chopper, by solid-state switch disjunction trouble point, power supply system
Internal combustion engine is then started, it is ensured that the normal power supply of load when system can not fully meet workload demand.In the present invention
System structure is simple, and operational efficiency is high, and power supply reliability is high.Additionally, the direct current micro-grid system in the present invention
Pure use regenerative resource and energy-storage system and internal combustion engine carry out energy supply, are saving the same of primary energy
Time also reduce environmental pollution, be suitable for the development construction demand of following related system.
It should be noted that what the present invention described is a kind of product form of direct current micro-grid system, other meets
The product of structure of the present invention, does not affects even if order etc. put by material, device name, outward appearance, device
The factor of product attribute differs, and still falls within the scope of protection of the invention.
Above content is to combine concrete preferred implementation further description made for the present invention, no
Can assert the present invention be embodied as be confined to these explanations.Common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, it is also possible to make some simple deductions or replace
Change, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. the direct current micro-grid system powered with looped network form, it is characterized in that, including: the looped network shape dc bus of different electric pressures, it is connected to the mixing type current-limiting chopper between the bus section, busbar section of described looped network shape dc bus, and is connected to the photovoltaic generating system on this looped network shape dc bus, accumulation power supply, internal combustion engine, changer, DC load, AC load；
Described accumulation power supply is connected from the looped network shape dc bus of described different electric pressures by described changer respectively with photovoltaic generating system, powers for described direct current micro-grid system；
The action when a certain section of circuit of described looped network shape dc bus breaks down of described mixing type current-limiting chopper, by its solid-state switch disjunction trouble point；
Described internal combustion engine is connected from the looped network shape dc bus of described different electric pressures by described changer, and when described mixing type current-limiting breaker actuation, DC load and AC load for described direct current micro-grid system provide stand-by power supply；
Wherein, described changer includes: three-phase DC/AC changer, two-way AC/DC changer, two-way DC/DC changer, unidirectional DC/DC changer, unidirectional DC/AC changer, unidirectional AC/DC changer；
Described photovoltaic generating system is connected with described looped network shape dc bus by described unidirectional DC/DC changer；
Described accumulation power supply is connected with described looped network shape dc bus by described two-way DC/DC changer；
Described internal combustion engine is connected with described looped network shape dc bus by described two-way AC/DC changer and/or unidirectional AC/DC changer；
Wherein, described AC load includes three-phase alternating current load and single phase industrial frequence AC load；The load of described three-phase alternating current is connected with described looped network shape dc bus by described three-phase DC/AC changer；Described single phase industrial frequence AC load is connected with described looped network shape dc bus by described unidirectional DC/AC changer.
2. the direct current micro-grid system powered with looped network form as claimed in claim 1, it is characterized in that, described DC load is two groups, often organizes and has two sub-DC loads respectively, and every sub-DC load is connected from the looped network shape dc bus of described different electric pressures by unidirectional DC/DC changer.
3. the direct current micro-grid system powered with looped network form as claimed in claim 2, it is characterised in that the electric pressure of described looped network shape dc bus is respectively 240V and 480V.
4. the direct current micro-grid system powered with looped network form as claimed in claim 3, it is characterised in that described direct current micro-grid system also includes the EMS being connected with described unidirectional DC/DC changer and described two-way DC/DC changer.
5. the direct current micro-grid system powered with looped network form as claimed in claim 4, it is characterised in that described accumulation power supply is accumulator.
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| CN104218796B (en) * | 2014-07-25 | 2017-09-01 | 国家电网公司 | One kind is without the bipolar DC DC converters in the port of bus four |
| CN105762921B (en) * | 2016-01-27 | 2018-03-13 | 江苏省电力公司南京供电公司 | A kind of cyclization of based superconductive current limiter turns method of supplying power to |
| CN106374533B (en) * | 2016-10-28 | 2024-04-30 | 西安特来电智能充电科技有限公司 | Miniature energy network system |
| CN109038539A (en) * | 2017-06-09 | 2018-12-18 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router |
| CN109245087A (en) * | 2018-10-12 | 2019-01-18 | 珠海格力电器股份有限公司 | A kind of DC power-supply system |
| CN109301824B (en) * | 2018-11-15 | 2022-07-12 | 清能华控科技有限公司 | Zero-disturbance flexible power distribution system based on double-circuit system power supply support |
| EP3793077A1 (en) * | 2019-09-12 | 2021-03-17 | ABB Schweiz AG | Uninterruptible power supply, ups, for connecting a multiphase load to an ac source and a dc source |
| CN113014196A (en) * | 2021-03-12 | 2021-06-22 | 中国电子科技集团公司第十八研究所 | Unmanned aerial vehicle energy management system topological structure |
| CN113872232B (en) * | 2021-10-20 | 2024-04-19 | 广东电网有限责任公司 | DC power distribution network topological structure of data center |
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| EP2363947A1 (en) * | 2010-03-03 | 2011-09-07 | SMA Solar Technology AG | Inverter with onboard network with multiple supplies |
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