CN205104903U - Non - contravariant type light stores up little electric wire netting of direct current system for modern architecture - Google Patents

Non - contravariant type light stores up little electric wire netting of direct current system for modern architecture Download PDF

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Publication number
CN205104903U
CN205104903U CN201520838879.7U CN201520838879U CN205104903U CN 205104903 U CN205104903 U CN 205104903U CN 201520838879 U CN201520838879 U CN 201520838879U CN 205104903 U CN205104903 U CN 205104903U
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China
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bus
load
energy
unit
type light
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CN201520838879.7U
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李晓学
张风燕
杜彪
杨贇
方博
孟超
魏闻
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CGN SOLAR ENERGY DEVELOPMENT Co Ltd
Xiamen University
China General Nuclear Power Corp
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CGN SOLAR ENERGY DEVELOPMENT Co Ltd
Xiamen University
China General Nuclear Power Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The utility model discloses a non - contravariant type light stores up little electric wire netting of direct current system for modern architecture, it includes the dc bus, photovoltaic power generation unit, the energy storage unit, the mains power supply unit, energy management unit and load, photovoltaic power generation unit links to each other with the dc bus through one -way DCDC rectifier module, the mains power supply unit links to each other with the dc bus through one -way ACDC rectifier module, the energy storage unit links to each other with the dc bus through two -way DCDC transform module, energy management unit includes host system and operational monitoring module, the operational monitoring module can be gathered it with host system communication connection, reach host system on the assay the data obtained, host system is according to these data according to power supply logic operation who sets for and the stability that keeps busbar voltage. It has following advantage: guarantee the quality of the inside electric energy of little electric wire netting, avoided undulant great electric energy repayment to higher level's commercial power distribution network in, detected the new problem of bringing for voltage control, frequency control and the isolated island of higher level's commercial power distribution network.

Description

A kind of non-inverse type light storage DC micro power grid system being applied to modern architecture
Technical field
The utility model relates to micro-grid system, particularly relates to a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture.
Background technology
Along with the quick growth of national economy, electricity needs rapid development, since a very long time, power department is all main to build large-scale power plant, long UHV transmission line as solution, but the drawbacks such as its investment is large, construction period length, environmental pollution also highlight day by day.Meanwhile, the accident of massive blackout several times in recent years also allows people recognize the fragility of concentration supply power system.Distributed generation technology (distributedgeneration, DG) arises at the historic moment just in this case.
Distributed generation technology (DG) has flexible, small-sized, dispersion, near the feature such as user side, effectively can improve user power utilization reliability and reduce transmission losses.But distributed generation technology has the drawbacks such as voltage instability, power fluctuation are large, can produce serious influence to the safety of higher level's electrical network and peak regulation.Micro-capacitance sensor technology solves the contradiction of distributed generation technology and bulk power grid well.Micro-capacitance sensor refers to electrical network form micro power, load and energy storage device combined, and it is independently overall as one, can be incorporated into the power networks, and also can run by island mode.
Photovoltaic, energy storage and load are combined, be called as light storage micro-capacitance sensor, and the particularity of photovoltaic material makes light storage micro-capacitance sensor to be applied in modern architecture well.For DC load increasing in modern architecture, as DC lighting, direct-flow air conditioner, DC refrigerator, direct-current charging post etc., light storage micro-capacitance sensor adopts DC bus transmission form to have the advantage such as the better quality of power supply, less electric energy loss than ac bus.Along with the popularization of technology and the large-scale application of photovoltaic power generation technology such as direct current household electrical appliances, light storage direct-current grid has wide development space.
Direct-current grid operational mode mainly contains and is incorporated into the power networks and islet operation.Traditional be incorporated into the power networks refer to microgrid by commercial power rectification from bulk power grid absorbed power again by inversion link to bulk power grid transmission power, this mode can ensure electricity consumption reliability and the micro-capacitance sensor quality of power supply of load in microgrid well, but direct-current grid can bring greater impact to higher level's power distribution network under inverter operation form, fundamentally change the unidirectional trend of distribution network, have the new problems such as voltage-regulation, power fluctuation, unplanned isolated island.And decoupled mode refers to that micro-capacitance sensor relies on inner micro battery and energy-storage system independently to power to internal load, points of common connection is not had with higher level's electrical network, this operational mode requires very high for power supply reliability, so need large-scale energy storage system, and its long-term discharge and recharge can reduce the energy-storage system life-span, when considering energy-storage system economy, the direct-current grid of islet operation also can not get extensive use.
Utility model content
The utility model provides a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture, which overcomes the deficiencies in the prior art described in background technology.
The utility model solves the technical scheme that its technical problem adopts:
A kind of non-inverse type light storage DC micro power grid system being applied to modern architecture, it comprises DC bus, photovoltaic generation unit, energy-storage units, mains-supplied unit, energy management unit and load, described photovoltaic generation unit is connected with DC bus by unidirectional DC/DC rectification module, described mains-supplied unit is connected with DC bus by unidirectional AC/DC rectification module, described energy-storage units is connected with DC bus by two-way DC/DC conversion module, described energy management unit comprise main control module and be located at this micro-grid system each unit in and the operational monitoring module that the running status of each unit is monitored, described operational monitoring module and main control module communicate to connect and can be gathered, analyze the data upload of acquisition to main control module, described main control module is photovoltaic generation unit according to this Data Control, energy-storage units and mains-supplied unit run according to the power supply logics of setting and keep the stable of busbar voltage.
Among one embodiment: described energy-storage units comprises lead acid accumulator.
Among one embodiment: described load comprises DC load, described DC bus can be directly connected with DC load or be connected with DC load by unidirectional DC/DC conversion module.
Among one embodiment: described load comprises AC load, described DC bus is connected with AC load by unidirectional DC/AC conversion module.
Among one embodiment: described energy management unit also comprises the insulating monitoring module for monitoring the state over the ground of DC bus and each unit, this insulating monitoring module and described main control module communicate to connect.
Among one embodiment: the amount voltage of described DC bus is 380V.
Among one embodiment: described DC load comprises direct-current charging post, DC frequency converting air-conditioner, DC lighting, DC distribution interface, DC refrigerator.
Among one embodiment: described AC load comprises alternating-current charging pile, A.C. distribution box.
The technical program is compared with background technology, and its tool has the following advantages:
1, described non-inverse type light storage DC micro power grid system adopts non-inversion form to be connected with higher level city electric unit, namely civil power is connected with DC bus by means of only unidirectional AC/DC modular converter (rectifier converter), this AC/DC converter does not have invert function, unnecessary electricity can not be fed back to civil power.In whole system, civil power as " the conveying person " of an energy, instead of as " recipient " of energy.This design ensure that relatively independent micro-capacitance sensor internal energy supply and the higher quality of power supply on the one hand, avoid the larger electric energy feedback of fluctuation in higher level's civil power power distribution network on the other hand, bring new problem to the voltage-regulation of higher level's civil power power distribution network, power adjustments and islanding detect.
2, described non-inverse type light storage DC micro power grid system inside adopts DC bus powered form, photovoltaic generation unit, mains-supplied unit and load are coupled together, being different from traditional micro-capacitance sensor inside adopts ac bus to connect, inversion link is needed to power to DC load, simplify micro-capacitance sensor supply line, avoid the energy loss that inversion conversion is brought.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 depicts a kind of system schematic being applied to the non-inverse type light storage DC micro power grid system of modern architecture described in the utility model.
Embodiment
Please refer to Fig. 1, a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture, it comprises DC bus 10, photovoltaic generation unit 20, energy-storage units 30, mains-supplied unit 40, energy management unit 50 and load.
In the present embodiment, the amount voltage of DC bus 10 is 380V.Photovoltaic generation unit 20 is connected with DC bus 10 by unidirectional DC/DC rectification module 1, and the high voltage direct current (between the fluctuation range of 300-700V) of the instability produced converts the stable DC electricity of stable about 380V to.This unidirectional DC/DC rectification module 1 is with MPPT controller.Mains-supplied unit 40 is connected with DC bus 10 by unidirectional AC/DC rectification module 2, the electric main of 220V is become the stable DC electricity of about 380V through rectifying conversion, energy-storage units 30 is connected with DC bus 10 by two-way DC/DC conversion module 3, realizes the to and fro flow of power between energy-storage units 30 and DC bus 10.In the present embodiment, described energy-storage units 30 can adopt lead acid accumulator.
Described load comprises DC load, DC bus 10 fluctuation range in the present embodiment is ± 5%, and range of voltage values is between 360V-400V, DC bus 10 can directly be connected with DC load, it can be the directly power supply such as direct-flow air conditioner 61, direct-current charging post 62 of 380V to rated voltage, or being connected with DC load by unidirectional DC/DC conversion module 4, can be the power supplies such as the DC refrigerator 63 of 24V (as required set), direct-current LED illumination 64, DC distribution interface and other numerous electronic equipments to rated voltage.
Described load also comprises AC load, DC bus is connected with AC load by unidirectional DC/AC conversion module 5, for 220V AC load, AC load comprises alternating-current charging pile 65 and A.C. distribution box, can be used for the electric motor car of all band Alternating Current Power Supply interfaces on market practical.
Described energy management unit 50 comprise main control module and be located at this micro-grid system each unit in and the operational monitoring module that the running status of each unit is monitored, operational monitoring module and main control module communicate to connect and can be gathered, analyze the data upload of acquisition to main control module, and main control module photovoltaic generation unit, energy-storage units and mains-supplied unit according to this Data Control run according to the power supply logics of setting and keep the stable of busbar voltage.Specifically, main control module according to each unit running state data of system obtained, according to setting power supply logics respectively control connection photovoltaic generation unit 20 unidirectional DC/DC rectifier 1, connect the two-way DC/DC converter 3 of energy-storage units 30 and connect the power supply decided instantly that is turned on or off of unidirectional AC/DC rectifier 2 of mains-supplied unit 40.
Described energy management unit also comprises the insulating monitoring module for monitoring the state over the ground of DC bus and each unit, and this insulating monitoring module and described main control module communicate to connect.
In the present embodiment, this operational monitoring module, insulating monitoring module all adopt RS485 bus and main control module to communicate to connect.
Non-inverse type light storage DC micro power grid system described in the utility model is three electric supply systems.Consider energy saving economy factor, the power supply logics of three power supplys is photovoltaic generation unit 20 > mains-supplied unit 40 > energy-storage units 30 here.Specifically can be divided into following four kinds of situations: 1, when the generated output of photovoltaic generation unit 20 is greater than bearing power, energy-storage units 30 is full of electricity, photovoltaic generation unit 20 runs on constant voltage mode, namely the generated output of photovoltaic generation unit 20 only need meet bearing power, MPPT controller need not be operated in maximum power point, now DC bus-bar voltage is greater than 375V, and electric main power supply unit 40 is in holding state; 2, when the generated output of photovoltaic generation unit 20 is greater than bearing power, energy-storage units 30 underfill electricity, photovoltaic generation unit 20 charges to energy-storage units 30 under being first operated in the maximum power pattern of MPPT controller, is slowly smooth to energy-storage units floating charge, enters again the first situation; 3, when the generated output of photovoltaic generation unit 20 is less than bearing power, now busbar voltage is fallen below 375V, and mains-supplied unit 40 starts output current, with balanced d. c busbar voltage, makes DC bus-bar voltage rise to normal operating value; 4, when power-off appears in mains-supplied unit 40, energy-storage units 30 serves as back-up source, powering load.The concrete effect within the system of described energy-storage units 30 is that, when the generated output of photovoltaic generation unit 20 is greater than bearing power, energy-storage units 30 coordinates photovoltaic generation unit 20, maintains the stable of DC bus-bar voltage; When the generated output of photovoltaic generation unit 20 is less than bearing power, photovoltaic generation unit 20 is operated in the maximum power pattern of MPPT controller, and when DC bus-bar voltage drop to 360V (as required set) below time, energy-storage units 30 starts power supply, to ensure the continued power of system.
The above, be only the utility model preferred embodiment, therefore the scope that the utility model implements can not be limited according to this, the equivalence namely done according to the utility model the scope of the claims and description change with modify, all should still belong in scope that the utility model contains.

Claims (8)

1. one kind is applied to the non-inverse type light storage DC micro power grid system of modern architecture, it is characterized in that: comprise DC bus, photovoltaic generation unit, energy-storage units, mains-supplied unit, energy management unit and load, described photovoltaic generation unit is connected with DC bus by unidirectional DC/DC rectification module, described mains-supplied unit is connected with DC bus by unidirectional AC/DC rectification module, described energy-storage units is connected with DC bus by two-way DC/DC conversion module, described energy management unit comprise main control module and be located at this micro-grid system each unit in and the operational monitoring module that the running status of each unit is monitored, described operational monitoring module and main control module communicate to connect and can be gathered, analyze the data upload of acquisition to main control module, described main control module is photovoltaic generation unit according to this Data Control, energy-storage units and mains-supplied unit run according to the power supply logics of setting and keep the stable of busbar voltage.
2. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 1, is characterized in that: described energy-storage units comprises lead acid accumulator.
3. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 1, it is characterized in that: described load comprises DC load, described DC bus can be directly connected with DC load or be connected with DC load by unidirectional DC/DC conversion module.
4. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 2, it is characterized in that: described load comprises AC load, described DC bus is connected with AC load by unidirectional DC/AC conversion module.
5. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 1, it is characterized in that: described energy management unit also comprises the insulating monitoring module for monitoring the state over the ground of DC bus and each unit, this insulating monitoring module and described main control module communicate to connect.
6. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 1, is characterized in that: the amount voltage of described DC bus is 380V.
7. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 3, is characterized in that: described DC load comprises direct-current charging post, DC frequency converting air-conditioner, DC lighting, DC distribution interface, DC refrigerator.
8. a kind of non-inverse type light storage DC micro power grid system being applied to modern architecture according to claim 4, is characterized in that: described AC load comprises alternating-current charging pile, A.C. distribution box.
CN201520838879.7U 2015-10-27 2015-10-27 Non - contravariant type light stores up little electric wire netting of direct current system for modern architecture Active CN205104903U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106208192A (en) * 2016-07-14 2016-12-07 上海工程技术大学 A kind of microgrid type solar recharging stake and charging method
CN106627202A (en) * 2016-11-07 2017-05-10 上海工程技术大学 Photovoltaic direct current charging pile system
CN107276202A (en) * 2017-06-16 2017-10-20 广州光使者科技应用有限公司 A kind of green energy architectural power supply system
CN108123497A (en) * 2017-12-27 2018-06-05 广东工业大学 A kind of power distribution cabinet of alternating current-direct current hybrid power supply and alternating current-direct current mixed power supply system
CN108695870A (en) * 2018-04-19 2018-10-23 宁德时代新能源科技股份有限公司 Fill energy storage integrated system
CN108944554A (en) * 2018-08-21 2018-12-07 深圳市华力特电气有限公司 A kind of light storage integral type charging pile
CN110247388A (en) * 2019-06-25 2019-09-17 珠海格力电器股份有限公司 Air-conditioning system
CN110912113A (en) * 2019-12-06 2020-03-24 北京新城绿源科技发展有限公司 Direct-current multi-energy complementary system and complementary method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106208192A (en) * 2016-07-14 2016-12-07 上海工程技术大学 A kind of microgrid type solar recharging stake and charging method
CN106208192B (en) * 2016-07-14 2018-12-21 上海工程技术大学 A kind of microgrid type solar recharging stake and charging method
CN106627202A (en) * 2016-11-07 2017-05-10 上海工程技术大学 Photovoltaic direct current charging pile system
CN106627202B (en) * 2016-11-07 2019-11-12 上海工程技术大学 A kind of photovoltaic DC charging pile system
CN107276202A (en) * 2017-06-16 2017-10-20 广州光使者科技应用有限公司 A kind of green energy architectural power supply system
CN108123497A (en) * 2017-12-27 2018-06-05 广东工业大学 A kind of power distribution cabinet of alternating current-direct current hybrid power supply and alternating current-direct current mixed power supply system
CN108123497B (en) * 2017-12-27 2020-08-11 广东工业大学 Power distribution cabinet for AC/DC hybrid power supply and AC/DC hybrid power supply system
CN108695870B (en) * 2018-04-19 2021-03-19 宁德时代新能源科技股份有限公司 Charging and energy storage integrated system
CN108695870A (en) * 2018-04-19 2018-10-23 宁德时代新能源科技股份有限公司 Fill energy storage integrated system
CN108944554A (en) * 2018-08-21 2018-12-07 深圳市华力特电气有限公司 A kind of light storage integral type charging pile
CN110247388A (en) * 2019-06-25 2019-09-17 珠海格力电器股份有限公司 Air-conditioning system
CN110912113A (en) * 2019-12-06 2020-03-24 北京新城绿源科技发展有限公司 Direct-current multi-energy complementary system and complementary method

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