CN104682533A - Double-bus direct current ultra-micro grid system suitable for sustainable building - Google Patents
Double-bus direct current ultra-micro grid system suitable for sustainable building Download PDFInfo
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- CN104682533A CN104682533A CN201310618758.7A CN201310618758A CN104682533A CN 104682533 A CN104682533 A CN 104682533A CN 201310618758 A CN201310618758 A CN 201310618758A CN 104682533 A CN104682533 A CN 104682533A
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- direct current
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- 238000004146 energy storage Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/185—Water-storage heaters using electric energy supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/382—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a double-bus direct current ultra-micro grid system suitable for a sustainable building according to the characteristics of Chinese buildings. A ultra-micro grid adopts a 380V and 48V double-bus structure to combine new energy source power generation, energy storage, combined heat and power generation, loads and control systems to form an intelligent micro grid, and the intelligent micro grid can work in the island and grid-connecting working modes; high voltage (380V) is used for driving a household high-power electric appliance, and low voltage (48V) is connected with miniature electronic equipment; an energy storage system adopts a supercapacitor and an electric automobile battery hybrid energy storage structure, and a house heat energy system is combined with an electric energy system by a combined heat and power generation system, a hot water tank and an electric heater, so as to realize the comprehensive management of energy. The double-bus direct current ultra-micro grid system has the advantages that by utilizing reasonable design and coordinated control, the quality of electric energy of the sustainable building can be improved; by combining the heat and power systems, the utilization efficiency of the energy source is improved; the distributed type new energy can be effectively utilized, and the functions of energy saving and emission reduction are realized.
Description
Technical field
The present invention 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 containing double-bus structure 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 the fast development of economy, energy crisis and environmental pollution have become the serious problems that the world today faces.Sustainable Building can realize " zero power consumption " of building, and utilize generation of electricity by new energy, reduce the consumption of limited fossil fuel, reduce air pollution, realizing 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 utilizes insulation material to improve energy saving as methods such as wall, use LED illumination; Utilize distribution type renewable energy to generate electricity and 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, and user operation is complicated.General sustainable house electricity, thermal energy system separate management, can not realize the maximum using of energy.
The present invention adopts pole micro power network regenerative resource, energy-storage system, co-generation unit to be combined, formed one pollute less, high, the infield intelligent micro-grid flexibly of energy utilization rate, save power transmission and distribution resource and operating cost, decrease the line loss concentrating transmission of electricity, decrease electric same total capacity, improve electrical network peak valley performance, improve reliability.House heat energy system is combined with electrical energy system by co-generation unit, boiler and electric heater by simultaneity factor, realizes the integrated management of energy.
Wherein, adopt direct-current grid form, it has without kelvin effect, loss is little, efficiency is high, without the need to reactive power compensation, there is not the intrinsic stable problem of ac power supply system, fed distance and power and be not also subject to the restriction of electric power system synchronous operation stability and be easy to the advantages such as control.Double-bus structure is adopted to meet the requirement to electric pressure of different electrical equipment, the loss of current transformer link electric energy in the middle of reducing.
Summary of the invention
The present invention is that the high efficiency realizing distributed energy utilizes, and solves Sustainable Building " zero energy consumption " problem, for user provide convenience, economic electric power energy, a kind of direct current pole micro power network system meeting modern architecture feature is proposed.This system adopts 380V and 48V double-bus structure distributed energy generating, energy-storage system, co-generation unit, load and control system to be combined, make house electrical network become a controllable load of bulk power grid, isolated island and grid-connected two kinds of mode of operations can be operated in.Energy-storage system adopts super capacitor and changes electric-type batteries of electric automobile hybrid energy-storing structure, and house heat energy system is combined with electrical energy system by co-generation unit, boiler and electric heater by simultaneity factor, realizes the integrated management of energy.
The technical solution used in the present invention is:
By two-way exchange-direct current (AC-DC) converter, distributed power source, comprise super capacitor and change the mixed energy storage system of electric-type batteries of electric automobile, co-generation unit and load and in Sustainable Building, form the atomic electrical network of double-bus direct current by DC bus, improve the quality of power supply by the control of micro-capacitance sensor.
Atomic electrical network can by two-way exchange-direct current (AC-DC) converter incoming transport electrical network in parallel.Two-way exchange-direct current (AC-DC) converter both can be voltage source converter, also can be current-source convertor.Two-way exchange-direct current (AC-DC) converter controls according to pulse-width modulation (PWM), then can reduce system harmonics, improves the power factor of system.
In every suite, all arrange-overlap co-generation unit, 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.House heat energy system is combined with electrical energy system by co-generation unit, boiler and electric heater by simultaneity factor, realizes the integrated management of energy.
Mixed energy storage system is by super capacitor and change electric-type batteries of electric automobile and form, and is connected with DC bus by two-way DC-DC (DC-DC) converter.When atomic network system electric energy is superfluous, DC bus-bar voltage raises and reaches limited voltage threshold, mixed energy storage system absorbs 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), exceedes limit value to avoid DC bus-bar voltage; When atomic network system electric energy is not enough, DC bus-bar voltage is reduced to limited voltage threshold, AC energy is become direct current energy to DC bus powered by two-way exchange-direct current (AC-DC) converter (being now rectifier), mixed energy storage system electric discharge is 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, then atomic electrical network not only may operate in and net state, and may operate in from net (or isolated island) state.When ac power supply system fault, may operate in from net (or isolated island) state, is that house powers by distributed power source and energy-storage system.
Atomic electrical network adopts 380V and 48V double-bus structure.High voltage (380V) is used for driving the electrical equipment that family expenses are high-power, input contains circuit of power factor correction, because these product mid-stage voltage are generally at about 380V, mate its industry standard, and the rectifier that most of household electrical appliance are connected with AC network can be cancelled.Low-voltage (48V) is identical with telecommunication standard voltage, directly can connect miniaturized electronics, improves its efficiency and fail safe.
In system, the control of converter both can adopt master & slave control, equity also can be adopted to control or droop control, can adopt hierarchical control again.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 had is in the present invention:
In Sustainable Building, utilize direct current atomic electrical network distributed energy generating, energy-storage system, co-generation unit, load and control system to be combined, achieve effective utilization of distributed new, improve power supply quality; Propose the atomic electric network composition of double-bus direct current, meet the requirement to electric pressure of different electrical equipment, the loss of current transformer link electric energy in the middle of reducing; Co-generation unit is utilized 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; Achieve the recovery of energy based on super capacitor and the mixed energy storage system changing electric-type batteries of electric automobile, reduce the fluctuation of DC bus-bar voltage; If distributed power source and energy storage system capacity are enough large, system can islet operation, thus improves the power supply reliability of sustainable house.
Accompanying drawing explanation
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 present invention will be further described.
With reference to accompanying drawing 1, disclosed in patent of the present invention is a kind of atomic network system of double-bus direct current being applicable to Sustainable Building and containing co-generation unit.This system adopts 380V and 48V double-bus structure photovoltaic generation, super capacitor energy-storage system, co-generation unit, load and control system to be combined.Grid-connection converter adopts two-way exchange-direct current (AC-DC) converter to realize the two-way flow of power.A set of co-generation unit is installed in each room, is not only user and provides electric power, and provide domestic water, improves efficiency of energy utilization.Clean energy resource (solar energy, wind energy) generating is 380V bussed supply by uni-directional converter.Double-bus structure facilitates each type load to power, and high voltage (380V) is used for driving the electrical equipment that family expenses are high-power, input contains circuit of power factor correction.Low-voltage (48V) is identical with telecommunication standard voltage, directly can connect miniaturized electronics, improves its efficiency and fail safe.
With reference to accompanying drawing 2, be stable DC busbar voltage, with super capacitor with change electric-type batteries of electric automobile form can with the mixed energy storage system of the quick two-way interaction of DC bus.When atomic network system electric energy is superfluous, DC bus-bar voltage raises and reaches limited voltage threshold, mixed energy storage system absorbs 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), exceedes limit value to avoid DC bus-bar voltage; When atomic network system electric energy is not enough, DC bus-bar voltage is reduced to limited voltage threshold, AC energy is become direct current energy to DC bus powered by two-way exchange-direct current (AC-DC) converter (being now rectifier), mixed energy storage system electric discharge is 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, facilitating the supply of user's hot water, house heat energy system being combined with electrical energy system simultaneously, realize complex energy management, often overlap house and all co-generation unit is installed.Electric heater can control water tank temperature, absorption peak electric power, under battery such as to be full of at the failure condition, protect energy-storage system.Electric heater can arrange hand switch and automatic switch, automatic switch reference value should comprise battery electric quantity, water temperature, with the Power Exchange of bulk power grid, realize seamlessly transitting of switch according to reference value, hand switch can other demands user friendly.
Claims (8)
1. the present invention proposes a kind of double-bus direct current pole micro power network system containing co-generation unit being applicable to Sustainable Building, it is characterized in that, two DC bus structure is adopted distributed energy generating, energy-storage system, co-generation unit, load and control system to be combined, form a controlled intelligent micro-grid, improve the quality of power supply; By co-generation unit, boiler and electric heater, house heat energy system is combined with electrical energy system, realize the integrated management of energy; Adopt super capacitor and change electric-type batteries of electric automobile mixed energy storage system, the two-way flow with bulk power grid power can be realized, isolated island and grid-connected two kinds of mode of operations can be operated in.
2. double-bus structure according to claim 1, is characterized in that, adopt the high and low pressure bus of 380V and 48V, being not limited only to this two electric pressures, also can be the high and low pressure bus of other electric pressures.High voltage (380V) is used for driving the electrical equipment that family expenses are high-power, input contains circuit of power factor correction.Low-voltage (48V) is identical with telecommunication standard voltage, directly can connect miniaturized electronics.
3. co-generation unit according to claim 1, is characterized in that, often overlaps in room and arranges a set of co-generation unit, also can share a set of co-generation unit in a few cover room.Co-generation unit not only provides electric power to supplement, and also for user provides domestic water, domestic water application type is unrestricted.
4. hot systems according to claim 1 and electric system combine, and it is characterized in that, are combined by house heat energy system by co-generation unit, boiler and electric heater with electrical energy system, realize the integrated management of energy.Often overlap in room and arrange a thermal cycle large water tank, electric heater can control water tank temperature, absorption peak electric power, under battery such as to be full of at the failure condition, protect energy-storage system.Electric heater can arrange hand switch and automatic switch, automatic switch reference value should comprise battery electric quantity, water temperature, with the Power Exchange of bulk power grid, realize seamlessly transitting of switch according to reference value, hand switch can other demands user friendly.Large water tank can to meet in house needed for all heating systems, comprises heating, Heating,Ventilating and Air Conditioning (HVAC), domestic water etc.
5. mixed energy storage system according to claim 1, is characterized in that, by super capacitor with change electric-type batteries of electric automobile and combine, be connected with DC bus by two-way DC-DC (DC-DC) converter.When atomic network system electric energy is superfluous, DC bus-bar voltage raises and reaches limited voltage threshold, and mixed energy storage system absorbs unnecessary electric energy and by charge-discharge machine to electric automobile power battery charging; When atomic network system electric energy is not enough, DC bus-bar voltage is reduced to limited voltage threshold, and mixed energy storage system electric discharge, to DC bus powered, to avoid DC bus-bar voltage lower than limit value, maintains the power-balance of system.
6. control system according to claim 1, is characterized in that, in system, the control of converter both can adopt master & slave control, equity also can be adopted to control or droop control, can adopt hierarchical control again.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.
7. two-way grid-connection converter according to claim 1, is characterized in that, atomic electrical network can by two-way exchange-direct current (AC-DC) converter incoming transport electrical network in parallel.Two-way exchange-direct current (AC-DC) converter both can be voltage source converter, also can be current-source convertor.Two-way exchange-direct current (AC-DC) converter controls according to pulse-width modulation (PWM), then can reduce system harmonics, improves the power factor of system.
8. isolated island according to claim 1 and grid-connected two kinds of mode of operations, it is characterized in that, if distributed power source and energy storage system capacity are enough large, then atomic electrical network not only may operate in and net state, and may operate in from net (or isolated island) state.When ac power supply system fault, may operate in from net (or isolated island) state, is that house powers by distributed power source and energy-storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618758.7A CN104682533A (en) | 2013-11-29 | 2013-11-29 | Double-bus direct current ultra-micro grid system suitable for sustainable building |
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| CN201310618758.7A CN104682533A (en) | 2013-11-29 | 2013-11-29 | Double-bus direct current ultra-micro grid system suitable for sustainable building |
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| CN104682533A true CN104682533A (en) | 2015-06-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509333A (en) * | 2016-01-15 | 2016-04-20 | 苏州创必成电子科技有限公司 | Capacitive self-powered water heater remote control |
| CN105509332A (en) * | 2016-01-15 | 2016-04-20 | 苏州创必成电子科技有限公司 | Terminal interaction water heater controller |
| CN106558884A (en) * | 2017-01-20 | 2017-04-05 | 许继集团有限公司 | The complementary control method of Regional Energy Internet control system active power balance optimization |
| CN106655291A (en) * | 2016-10-14 | 2017-05-10 | 湖南大学 | Micro-grid group architecture and autonomous coordination control method thereof |
| CN106849106A (en) * | 2016-12-07 | 2017-06-13 | 湖南大学 | DC distribution net system voltage flexible control method |
| US11862970B2 (en) | 2018-10-12 | 2024-01-02 | Gree Electric Appliances, Inc. Of Zhuhai | DC home power consumption system and wiring method for home appliances based on the system |
-
2013
- 2013-11-29 CN CN201310618758.7A patent/CN104682533A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509333A (en) * | 2016-01-15 | 2016-04-20 | 苏州创必成电子科技有限公司 | Capacitive self-powered water heater remote control |
| CN105509332A (en) * | 2016-01-15 | 2016-04-20 | 苏州创必成电子科技有限公司 | Terminal interaction water heater controller |
| CN106655291A (en) * | 2016-10-14 | 2017-05-10 | 湖南大学 | Micro-grid group architecture and autonomous coordination control method thereof |
| CN106655291B (en) * | 2016-10-14 | 2019-02-12 | 湖南大学 | A kind of microgrid group framework and its autonomous control method for coordinating |
| CN106849106A (en) * | 2016-12-07 | 2017-06-13 | 湖南大学 | DC distribution net system voltage flexible control method |
| CN106849106B (en) * | 2016-12-07 | 2019-11-12 | 湖南大学 | DC distribution net system voltage flexible control method |
| CN106558884A (en) * | 2017-01-20 | 2017-04-05 | 许继集团有限公司 | The complementary control method of Regional Energy Internet control system active power balance optimization |
| CN106558884B (en) * | 2017-01-20 | 2019-03-19 | 许继集团有限公司 | Regional Energy Internet control system active power balance optimizes complementary adjusting method |
| US11862970B2 (en) | 2018-10-12 | 2024-01-02 | Gree Electric Appliances, Inc. Of Zhuhai | DC home power consumption system and wiring method for home appliances based on the system |
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Application publication date: 20150603 |