CN203722319U - Bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings - Google Patents
Bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings Download PDFInfo
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- CN203722319U CN203722319U CN201320766509.8U CN201320766509U CN203722319U CN 203722319 U CN203722319 U CN 203722319U CN 201320766509 U CN201320766509 U CN 201320766509U CN 203722319 U CN203722319 U CN 203722319U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
Combining with the characteristics and demands of Chinese buildings, the utility model provides a bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings. An excessively-miniature power grid employs a direct-current bus to integrate new-energy power generation, a super-capacitor energy-storage system, a cogeneration system, a load and a control system into one body, thereby forming an intelligent miniature power grid which is low in pollution, is high in utilization rate of energy, and is flexible in installation place. The intelligent miniature power grid can work in an island mode and a grid-connected mode. The excessively-miniature power grid can be connected to an alternating-current power grid through a bidirectional AC-DC converter, thereby achieving the bidirectional flow of power. The energy-storage system employs a hybrid energy-storage structure employing a super-capacitor and a power-switching type electric-car battery. Meanwhile, the energy-storage system enables a house heat energy system to be combined with a power system through the cogeneration system, a hot water tank, and an electric heater, thereby achieving the comprehensive management of energy. Through reasonable design and coordinated control, the proposed excessively-miniature power grid can improve the power quality of the sustainable buildings. The excessively-miniature power grid combines a heat system with a power system, thereby improving the utilization rate of energy, and achieving the effective utilization of distributed new energy and a function of energy conservation and emission reduction.
Description
Technical field
The utility model relates to the electric power system that the atomic network system of a kind of electric power system direct current combines with co-generation unit.Refer in particular to and can realize to and fro flow of power with exchanging large electrical network, for Sustainable Building, house electrical energy system is combined with heat energy system, there is the atomic mains supply system of direct current of high-energy utilance.
Background technology
Along with economic fast development, energy crisis and environmental pollution have become the serious problems that the world today faces.Sustainable Building can be realized building " zero power consumption ", utilizes generation of electricity by new energy, reduces the consumption of limited fossil fuel, reduces air pollution, realizes the sustainable development in energy-saving and emission-reduction and city, is the housing type that future city is greatly developed.
At present, known Sustainable Building is to utilize insulation material to improve energy saving as methods such as wall, use LED illuminations; Utilize distribution type renewable energy generating that electric power is provided.But compared with micro power network, distribution type renewable energy power generation energy resource utilance is low, control structure is disperseed, user's complicated operation.General sustainable house electricity, thermal energy system separate management, can not realize the maximum using of energy.
The utility model adopts utmost point micro power network that regenerative resource, energy-storage system, co-generation unit are combined, form a pollution less, high, the infield intelligent micro-grid flexibly of energy utilization rate, power transmission and distribution resource and operating cost are saved, reduce the line loss of concentrated transmission of electricity, reduce electrical network total capacity, improve electrical network peak valley performance, improved reliability.Simultaneity factor combines house heat energy system by co-generation unit, boiler and electric heater with electrical energy system, realize the integrated management of energy.
Wherein, adopt DC micro-electric net form formula, it has without kelvin effect, loss is little, efficiency is high, without reactive power compensation, do not exist the intrinsic stable problem of ac power supply system, fed distance and power are not subject to the restriction of electric power system synchronous operation stability yet and are easy to the advantages such as control.Realize and the two-way flow of grid power greatly by two-way exchange-direct current (AC-DC) converter.
Summary of the invention
The utility model is the high efficiency utilization that realizes distributed energy, solves Sustainable Building " zero energy consumption " problem, for user provides convenience, the electric power energy of economy, proposes a kind of direct current utmost point micro power network system that meets modern architecture feature.This system adopts DC bus that distributed energy generating, energy-storage system, co-generation unit, load and control system are combined, and makes house electrical network become a controllable load of large electrical network, can be operated in isolated island and grid-connected two kinds of mode of operations.Energy-storage system adopts super capacitor and changes electric formula batteries of electric automobile hybrid energy-storing structure, and simultaneity factor combines house heat energy system by co-generation unit, boiler and electric heater with electrical energy system, realize the integrated management of energy.
The technical solution adopted in the utility model is:
Two-way exchange-direct current (AC-DC) converter, distributed power source, the mixed energy storage system, co-generation unit and the load that comprise super capacitor and change electric formula batteries of electric automobile are consisted of to the atomic electrical network of double-bus direct current in Sustainable Building DC bus, improve the quality of power supply by the control of micro-electrical network.
Atomic electrical network can be by two-way exchange-direct current (AC-DC) converter incoming transport electrical network in parallel.Two-way exchange-direct current (AC-DC) converter can be both voltage source converter, can be also current-source convertor.Two-way exchange-direct current (AC-DC), if converter adopts pulse-width modulation (PWM) to control, can reduce system harmonics, improves the power factor of system.The two-way AC/DC converter that two-way exchange-direct current (AC-DC) converter also can adopt two closed-loop vector decoupling zero PWM to control, interior circular current control, outer shroud voltage control.In the time that atomic electrical network internal power is not enough, can provide energy by exchanging large electrical network; In the time that micro-electrical network electric energy is superfluous, DC bus-bar voltage is elevated to restriction threshold values, and power is flowed to and exchanged large electrical network by bi-directional inverter, realizes the two-way flow of power.
A set of co-generation unit is all set in every suite, and system is connected with DC bus by DC-to-DC (DC-DC) converter.Co-generation unit not only can provide electric energy, and provides domestic water or Heating,Ventilating and Air Conditioning (HVAC) water for user.Simultaneity factor combines house heat energy system by co-generation unit, boiler and electric heater with electrical energy system, realize the integrated management of energy.
Mixed energy storage system is by super capacitor and change electric formula batteries of electric automobile and form, and is connected with DC bus by two-way DC-DC (DC-DC) converter.In the time that atomic network system electric energy is superfluous, DC bus-bar voltage raises and reaches limited voltage threshold, mixed energy storage system absorb unnecessary electric energy and by charge-discharge machine to electric automobile power battery charging, unnecessary electric energy in addition feeds back to AC network by two-way exchange-direct current (AC-DC) converter (being now inverter), to avoid DC bus-bar voltage to exceed limit value; In the time that atomic network system electric energy is not enough, DC bus-bar voltage is reduced to limited voltage threshold, two-way exchange-direct current (AC-DC) converter (being now rectifier) becomes direct current energy to DC bus powered by AC energy, mixed energy storage system discharges to DC bus powered, to avoid DC bus-bar voltage lower than limit value, maintain the power-balance of system.
If distributed power source and energy storage system capacity are enough large, atomic electrical network not only may operate in and net state, and may operate in from net (or isolated island) state.In the time of ac power supply system fault, may operate in from net (or isolated island) state, be house power supply by distributed power source and energy-storage system.
Atomic electrical network adopts DC bus structure.For following Sustainable Building, than ac bus, adopt DC bus to there is more advantage, can reduce the progression of power converter, improve whole efficiency, without considering the problems such as frequency stability, reactive power, kelvin effect and A.C.power loss.
In system, the control of converter both can adopt principal and subordinate to control, and also can adopt equity to control or droop control, can adopt again hierarchical control.In system, control command can be given by communication system by control centre, also can be given according to the voltage and current of system.
Compared with prior art, the advantage having is the utility model:
In Sustainable Building, utilize the atomic electrical network of direct current that distributed energy generating, energy-storage system, co-generation unit, load and control system are combined, realized distributed new effective utilization, improved power supply quality; Adopt DC bus to reduce progression, the raising whole efficiency of power converter; Utilize co-generation unit to improve efficiency of energy utilization, simultaneously for user provides domestic water; By co-generation unit, boiler and electric heater, house heat energy system is combined with electrical energy system, realize complex energy management; Realize the recovery of energy based on super capacitor and the mixed energy storage system that changes electric formula batteries of electric automobile, reduced the fluctuation of DC bus-bar voltage; If distributed power source and energy storage system capacity are enough large, system can islet operation, thereby has improved the power supply reliability of sustainable house.
Brief description of the drawings
Fig. 1 is the atomic network system structure chart of double-bus direct current containing co-generation unit.
Fig. 2 is mixed energy storage system structured flowchart.
Fig. 3 is co-generation unit figure.
Specific embodiments
Below in conjunction with accompanying drawing, the utility model is described further.
With reference to accompanying drawing 1, the utility model patent is disclosed is a kind of double-bus direct current atomic network system of Sustainable Building containing co-generation unit that be applicable to.This system adopts DC bus that photovoltaic generation, super capacitor energy-storage system, co-generation unit, load and control system are combined.Grid-connected converter using two-way exchange-direct current (AC-DC) converter is realized the two-way flow of power.A set of co-generation unit is installed in each room, not only for user provides electric power, and provides domestic water, improves efficiency of energy utilization.Clean energy resource (solar energy, wind energy) generating is DC bus powered by monotonic transformation device.
With reference to accompanying drawing 2, be stable DC busbar voltage, with super capacitor with change electric formula batteries of electric automobile composition can with the mixed energy storage system of the quick two-way interaction of DC bus.In the time that atomic network system electric energy is superfluous, DC bus-bar voltage raises and reaches limited voltage threshold, mixed energy storage system absorb unnecessary electric energy and by charge-discharge machine to electric automobile power battery charging, unnecessary electric energy in addition feeds back to AC network by two-way exchange-direct current (AC-DC) converter (being now inverter), to avoid DC bus-bar voltage to exceed limit value; In the time that atomic network system electric energy is not enough, DC bus-bar voltage is reduced to limited voltage threshold, two-way exchange-direct current (AC-DC) converter (being now rectifier) becomes direct current energy to DC bus powered by AC energy, mixed energy storage system discharges to DC bus powered, to avoid DC bus-bar voltage lower than limit value, maintain the power-balance of system.
With reference to accompanying drawing 3, for improving system effectiveness, facilitate the supply of user's hot water, house heat energy system is combined with electrical energy system simultaneously, realize complex energy management, every cover house is all installed co-generation unit.Electric heater can be controlled water tank temperature, and absorption peak electric power is protected energy-storage system under battery such as is full of at the failure condition.Electric heater can arrange hand switch and automatic switch, and automatic switch reference value should comprise battery electric quantity, water temperature, Power Exchange with large electrical network, realizes seamlessly transitting of switch according to reference value, and hand switch can user friendly other demands.
Claims (4)
1. one kind is applicable to the inter-act direct current utmost point micro power network system of Sustainable Building, distributed energy generating, energy-storage system, load connect by DC bus, it is characterized in that: co-generation unit, boiler and electric heater composition heat energy system access utmost point micro power network, two-way exchange-direct current (AC-DC) converter connects conventional large electrical network and utmost point micro power network, super capacitor and change electric formula batteries of electric automobile formation mixed energy storage system.
2. the inter-act direct current utmost point micro power network system that is applicable to Sustainable Building according to claim 1, it is characterized in that co-generation unit is connected with DC bus and boiler, electric heater is connected with boiler, electric heater arranges hand switch and automatic switch, and automatic switch reference value comprises energy-storage system electric weight, water temperature, Power Exchange value with large electrical network.
3. the inter-act direct current utmost point micro power network system that is applicable to Sustainable Building according to claim 1, is characterized in that two-way exchange-direct current (AC-DC) converter AC connects the large electrical network of interchange, and DC side connects utmost point micro direct-current power grid.
4. the inter-act direct current utmost point micro power network system that is applicable to Sustainable Building according to claim 1, it is characterized in that mixed energy storage system by super capacitor and change electric formula batteries of electric automobile forming, mixed energy storage system is connected with DC bus by two-way DC-DC (DC-DC) converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766509.8U CN203722319U (en) | 2013-11-29 | 2013-11-29 | Bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320766509.8U CN203722319U (en) | 2013-11-29 | 2013-11-29 | Bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings |
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| CN203722319U true CN203722319U (en) | 2014-07-16 |
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| CN201320766509.8U Expired - Fee Related CN203722319U (en) | 2013-11-29 | 2013-11-29 | Bidirectional interactive direct-current excessively-miniature power grid system suitable for sustainable buildings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103251A1 (en) * | 2016-12-05 | 2018-06-14 | 珠海格力电器股份有限公司 | Control device and control method for direct-current micro-grid, and direct current micro-grid system |
-
2013
- 2013-11-29 CN CN201320766509.8U patent/CN203722319U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103251A1 (en) * | 2016-12-05 | 2018-06-14 | 珠海格力电器股份有限公司 | Control device and control method for direct-current micro-grid, and direct current micro-grid system |
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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: 20140716 Termination date: 20141129 |
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| EXPY | Termination of patent right or utility model |