CN212033776U - Building energy-saving comprehensive utilization system based on wind-solar distributed power supply - Google Patents
Building energy-saving comprehensive utilization system based on wind-solar distributed power supply Download PDFInfo
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- CN212033776U CN212033776U CN202020707511.8U CN202020707511U CN212033776U CN 212033776 U CN212033776 U CN 212033776U CN 202020707511 U CN202020707511 U CN 202020707511U CN 212033776 U CN212033776 U CN 212033776U
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- 238000010248 power generation Methods 0.000 claims abstract description 35
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- 230000005611 electricity Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005338 heat storage Methods 0.000 claims description 7
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 2
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- 230000005855 radiation Effects 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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- 239000003463 adsorbent Substances 0.000 description 2
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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
- Y02A30/00—Adapting or protecting infrastructure or their operation
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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
- Y02B10/10—Photovoltaic [PV]
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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
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Abstract
Building energy-saving comprehensive utilization system based on wind-solar distributed power supply relates to the field of power systems and new energy. The system mainly comprises a multi-energy complementary distributed power supply system, a household electricity management system, a solar heating system and a solar refrigerating system. The utility model discloses at first realized heat energy, chemical energy, light energy, electric energy and wind energy at building system's rational distribution and comprehensive utilization. Then, the photovoltaic system always works at the maximum power point, and then the problem of power fluctuation caused by randomness of wind power generation and solar photovoltaic generation is reduced by using the storage battery energy storage device. And finally, the distribution proportion of the distributed power supply in the multi-energy complementary system to the power consumption of the conventional household load is adjusted through the household power management system, so that the fluctuation problem of a solar heating and refrigerating system is solved, the characteristics of high flexibility and environmental friendliness of the distributed power supply are brought into full play, certain energy loss is avoided, and the electric energy cost is saved.
Description
Technical Field
The utility model relates to an electric power system and new forms of energy field specifically are building energy-saving comprehensive utilization system based on scene distributed generator.
Background
With the shortage of conventional energy, building power supply is gradually developed in various and sustainable directions, and photovoltaic power generation technology using clean and renewable solar energy as energy is generally concerned by countries in the world and is rapidly developed. Distributed power generation sources (DER) such as Building Integrated PV (BIPV), wind turbine power generation for buildings, and household fuel cell power generation systems have been developed, and the electric energy generated by these power sources is direct current or can be converted into direct current after being simply rectified.
Modern building electrical equipment is gradually trending towards using direct current or power converters with a direct current link. Such as IT equipment, entertainment audio-visual equipment, LED lighting, personal electronic equipment and the like, directly work by using direct current; the frequency converter driving of the rotating equipment such as air conditioners, washing machines, printers and the like, which contains a direct current link, has become a development trend.
The utility model discloses a solve the problem that distributed power source used multipurposely on building consumer, an energy-conserving integrated management system based on scene distributed power source in building is provided, to the power supply problem of building, a DC power supply system of constituteing jointly by load and micro-power source (be the distributed power source in the building, like photovoltaic power generation, wind power generation and battery etc.) has been proposed, it can provide the electric energy for the building simultaneously, heat energy and cold energy, the inside power of building mainly is responsible for the conversion of energy by power electronic equipment, and provide must control system.
SUMMERY OF THE UTILITY MODEL
In order to realize the above purpose, the utility model discloses the technical scheme who adopts is: a building energy-saving comprehensive utilization system based on wind-solar distributed power supplies mainly comprises a multi-energy complementary distributed power supply system, a household power management system, a solar heating system and a solar refrigerating system.
Furthermore, the multi-energy complementary distributed power system mainly comprises a solar photovoltaic array power generation device, a wind power generation device and a storage battery energy storage device, electric energy generated by the solar photovoltaic array power generation device and the wind power generation device is stored and released through the storage battery energy storage device, and the electric energy is connected to the same direct current bus in parallel through a buck-boost chopper circuit and is output to a household power management system.
Preferably, the wind power generation device selects a permanent magnet direct-drive wind power generator.
Preferably, the grid connection of the solar photovoltaic array power generation device and the wind power generation device selects a unidirectional Boost circuit, and the storage battery energy storage device selects a bidirectional buck-Boost chopper circuit.
Furthermore, the solar heating system mainly comprises a solar heat collector, a heat storage water tank, an electric water heater, a ground source heat pump, a ground source heat exchanger group and an indoor cooling and heating cabinet machine, wherein the indoor cooling and heating cabinet machine and the heat storage water tank provide stable heating and bathroom hot water for users.
Furthermore, the solar refrigeration system adopts absorption type solar refrigeration and mainly comprises a solar heat collector, an absorber, a generator, a condenser and an evaporator, wherein the condenser is used for realizing refrigeration of an indoor air conditioner of a user.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses renewable energy and traditional electric power facility's advantage in the full play building, each distributed power source's of high-efficient ground performance value and benefit. Firstly, storing and releasing electric energy generated by a solar photovoltaic array and wind power generation through a storage battery device, and converting the electric energy through a buck-boost chopper circuit in the process; then the electric energy is uniformly distributed to an electric water heater, an air conditioner, common household electricity and the like by a household electricity management system together with the traditional household electricity through direct current bus inversion frequency modulation.
The utility model discloses at first utilize distributed power such as photoelectricity, wind-powered electricity generation and light and heat combination technique to realize solar energy function and solar energy refrigeration respectively to realized heat energy, chemical energy, light energy, electric energy and wind energy at building system's rational distribution and comprehensive utilization. Then, the photovoltaic system always works at the maximum power point, and then the problem of power fluctuation caused by randomness of wind power generation and solar photovoltaic generation is reduced by using the storage battery energy storage device. The multi-energy complementary distributed power system does not participate in grid connection of a power grid and is only used for family use, and cost overhead generated in the grid connection scheduling process is saved. And finally, the distribution proportion of the distributed power supply in the multi-energy complementary system to the power consumption of the conventional household load is adjusted through the household power management system, so that the fluctuation problem of a solar heating and refrigerating system is solved, the characteristics of high flexibility and environmental friendliness of the distributed power supply are brought into full play, certain energy loss is avoided, and the electric energy cost is saved.
Drawings
The energy-saving comprehensive utilization system for building buildings based on wind-solar distributed power supply of the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings.
FIG. 1 is a block diagram of a wind and light distributed power supply in a building system.
Fig. 2 is a flow chart of control strategy relationship of the distributed power supply in the home management system.
Detailed Description
Referring to fig. 1, a building energy-saving comprehensive utilization System based on wind and light distributed power supplies mainly comprises a multi-energy complementary distributed power supply System, a Household Electricity Management System (HEMS), a solar heating System and a solar cooling System.
The multi-energy complementary distributed power supply system mainly comprises a solar photovoltaic array power generation device (PV), a wind power generation device (PMSG) and a storage Battery energy storage device (Batery), wherein electric energy generated by the solar photovoltaic array power generation device and the wind power generation device is stored and released through the storage Battery energy storage device, and is connected to the same direct current bus in parallel through a buck-boost chopper circuit and is output to a household power management system. The wind power generation device selects a permanent magnet direct-drive wind power generator.
The solar heating system mainly comprises a solar heat collector, a heat storage water tank, an electric water heater, a ground source heat pump, a ground source heat exchanger group and an indoor cooling and heating cabinet machine, wherein the indoor cooling and heating cabinet machine and the heat storage water tank provide stable heating and bathroom hot water for users. The solar heating, solar hot water and solar energy storage are comprehensively utilized by arranging a heat collection, heat storage and auxiliary energy system.
The solar refrigeration system adopts adsorption type solar refrigeration and mainly comprises a solar heat collector, an absorber, a generator, a condenser and an evaporator, wherein the condenser is used for realizing refrigeration of an indoor air conditioner of a user.
The control method of the building energy-saving comprehensive utilization system based on the wind-solar distributed power supply comprises the following steps:
firstly, the solar heating system transfers the heat energy of solar illumination to the domestic heating and the bathroom hot water under the condition of sufficient solar radiation in the daytime, and the heat transferred in the whole process is QjRepresents; the solar heating system is insufficient in sunlight radiation or at night, the required residual heat is provided by the power of the power grid, and P is usedheatAnd (4) showing.
Secondly, when solar radiation is sufficient in the daytime, the heat collector absorbs the solar radiation and then heats up, the high temperature enables the refrigerant in the generator to be desorbed from the adsorbent, the desorbed refrigerant enters the condenser and is cooled into liquid through a cooling medium, then enters the evaporator through the throttle valve, and then enters the generator again through the absorber and the pump; when the sunlight radiation is insufficient or at night, the ambient temperature is reduced, the heat collector is cooled, the temperature and the pressure are reduced, and the adsorbent starts to work to absorb the refrigerant, so that the refrigeration effect is generated. The solar refrigeration system has insufficient output, the required surplus power is provided by the power of the power grid, and P is usedcoolAnd (4) showing.
Solar heating and solar refrigeration are respectively realized by utilizing a photoelectric and photo-thermal combination technology, and a solar refrigeration system and a solar heating system respectively work according to control modes set by the intensity of solar radiation. Wherein the thermal efficiency of the solar heating device is as follows:
in the formula QjRepresents heat; a. thecRepresents the area (m) of the solar collector2) (ii) a A. B represents a constant related to the type and the model of the heat collector; t is tfiRepresenting collector inlet fluid temperature; t is taRepresents the ambient temperature; hTRepresenting the enthalpy.
And thirdly, the energy conversion structure and topology of the solar photovoltaic array power generation device are cascaded direct current modules, a DC-DC converter is configured for each photovoltaic module to perform maximum power point tracking, so that the photovoltaic system finally works at the maximum power point, and then the modules are connected in series to a certain voltage level and are connected to a direct current bus. Photovoltaic power generation output power PPVAnd (4) showing.
The method for acquiring the output power of the photovoltaic system under the given illumination condition by adopting the MPPT control method comprises the following specific steps: and disturbing the output voltage of the photovoltaic cell and observing the change of the output power of the photovoltaic system by a disturbance observation method, and continuously changing the direction of the disturbed voltage according to the trend of the power change so as to ensure that the photovoltaic system finally works at the maximum power point. The maximum power tracking control of the photovoltaic system adopts a variable step size perturbation and observation method MPPT control method to obtain the output power of the photovoltaic system under the given illumination condition, the control circuit of the perturbation and observation method is simple in structure, the number of parameters to be measured is small, the external environment change can be rapidly and accurately tracked, and the stability of the system is ensured.
And fourthly, establishing a distributed power supply system based on a storage battery, wind power generation and solar photovoltaic power generation, and connecting the distributed power supply system to the same direct current bus in parallel through a direct current chopper circuit. The storage power of the storage battery and the output power of the wind power generation are respectively PBatAnd PPMSGAnd (4) showing.
According to the given value of the bus voltage, the voltage threshold and the current maximum value signal, the grid-connected interface circuit can work in a voltage droop mode or a current limiting mode; the storage battery can work in a voltage droop mode, a current limiting mode or a default mode according to signals given by the battery monitoring system and the controller, and the solar panel DC/DC converter is switched among the MPPT mode, the current limiting mode and the voltage droop mode.
The multi-energy complementary distributed power system is characterized in that solar photovoltaic power generation and wind power generation are connected with a direct-current bus through a Boost converter, a storage battery is connected to a direct-current power grid through a bidirectional DC-DC converter, and then is connected to a household power management system through a three-phase PWM inverter, an RL filter circuit and related protection equipment, so that the topological structure of the whole system is realized. And the multi-energy complementary distributed power system does not participate in grid connection of a power grid and is only used for household use.
A Buck/Boost bidirectional power converter selects a complementary PWM control method to realize soft switching of a power device in order to avoid instantaneous impact caused by bidirectional switching.
The protection device mainly comprises a fuse and a circuit breaker, and the reliability and the whole service life of the system are improved.
The method has the advantages that the voltage of the direct current bus is adjusted, an external characteristic droop parallel connection method is adopted, the distribution characteristic of a distributed power supply system is fully utilized, local control is relied on, the stability of the bus voltage is controlled, the generation of circulation current is avoided, and the reliability is higher.
Establishing a household power management system, adjusting the power distribution proportion of the distributed power supply and the conventional household load in the multi-energy complementary system, and ensuring the safety and stability of power consumption of users on the premise of ensuring the priority of the distributed power supply for equipment with low safety level, thereby ensuring the maximization, safety and reliability of the utilization of household power. Power grid power P consumed by household power consumptiongridAnd (4) showing.
The electric energy is uniformly distributed to an electric water heater, an air conditioner and other common household power supplies by a household power management system together with the traditional household power supplies through direct current bus inversion frequency modulation. The reasonable distribution and the comprehensive utilization of heat energy, chemical energy, light energy, electric energy and wind energy in a building system are realized.
In the household electricity management system, the relevant control strategy relationship is as follows:
PThermal＝Pheat+Pcool+Qj
PDER＝PPV+PPMSG+PBat
Pload+Pheat+Pcool+PDER+Pgrid＝0
in the formula PDERPower provided for a distributed power supply; ploadPower consumed in a building; pThermalThe sum of the energy required by heating and cooling of the household.
Please refer to FIG. 2, when Pheat+Pcool<When 0, the solar energy can be provided by the electric quantity required by the heating and refrigerating system of the family building; when P is presentheat+Pcool> 0, and distributed power supply PDER<0 hours, power P consumed in the buildingloadFrom the power network PgridProviding; if PDER>0 hours, power P consumed in the buildingloadFrom Pgrid-PDERProvided is a method.
The foregoing is merely exemplary and illustrative of the principles of the present invention, and various modifications, additions and substitutions as may be made to the specific embodiments described herein by those skilled in the art are intended without departing from the spirit and scope of the invention as defined in the accompanying claims.
Claims (5)
1. The utility model provides a building energy-saving comprehensive utilization system based on scene distributed generator which characterized in that: the household electricity consumption management system mainly comprises a multi-energy complementary distributed power system, a household electricity consumption management system, a solar heating system and a solar refrigeration system, wherein the multi-energy complementary distributed power system mainly comprises a solar photovoltaic array power generation device, a wind power generation device and a storage battery energy storage device, electric energy generated by the solar photovoltaic array power generation device and the wind power generation device is stored and released through the storage battery energy storage device, and is connected to the same direct current bus in parallel through a buck-boost chopper circuit and is output to the household electricity consumption management system.
2. The building energy-saving comprehensive utilization system based on the wind-solar distributed power supply as claimed in claim 1, wherein: the wind power generation device selects a permanent magnet direct-drive wind power generator.
3. The building energy-saving comprehensive utilization system based on the wind-solar distributed power supply as claimed in claim 1, wherein: the grid connection of the solar photovoltaic array power generation device and the wind power generation device selects a one-way Boost circuit, and the storage battery energy storage device selects a two-way buck-Boost chopper circuit.
4. The building energy-saving comprehensive utilization system based on the wind-solar distributed power supply as claimed in claim 1, wherein: the solar heating system mainly comprises a solar heat collector, a heat storage water tank, an electric water heater, a ground source heat pump, a ground source heat exchanger group and an indoor cooling and heating cabinet machine, wherein the indoor cooling and heating cabinet machine and the heat storage water tank provide stable heating and bathroom hot water for users.
5. The building energy-saving comprehensive utilization system based on the wind-solar distributed power supply as claimed in claim 4, wherein: the solar refrigeration system adopts adsorption type solar refrigeration and mainly comprises a solar heat collector, an absorber, a generator, a condenser and an evaporator.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117168205A (en) * | 2023-10-24 | 2023-12-05 | 广东美控电子科技有限公司 | Cold and hot energy storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117168205A (en) * | 2023-10-24 | 2023-12-05 | 广东美控电子科技有限公司 | Cold and hot energy storage system |
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