CN106374533B - Miniature energy network system - Google Patents
Miniature energy network system Download PDFInfo
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- CN106374533B CN106374533B CN201610972103.3A CN201610972103A CN106374533B CN 106374533 B CN106374533 B CN 106374533B CN 201610972103 A CN201610972103 A CN 201610972103A CN 106374533 B CN106374533 B CN 106374533B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 104
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 58
- 238000010248 power generation Methods 0.000 claims abstract description 57
- 238000004146 energy storage Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009133 cooperative interaction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- H02J3/383—
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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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- H02J3/386—
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- H02J3/387—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention discloses a miniature energy network system, which comprises an energy management unit and a plurality of conversion units capable of realizing unidirectional or bidirectional conversion and flow of energy in the forms of AC/DC, DC/AC and AC/AC, wherein one side of each conversion unit is connected with a power generation unit, energy storage, an electric automobile or a load, and the other side is connected with a direct current bus or an alternating current bus through a metering unit and a controllable switch; the direct current bus is connected with the alternating current bus through the bidirectional DC/AC conversion unit and the controllable switch; the alternating current bus is connected with the transformer through the metering unit and the controllable switch, and the input end of the transformer is connected with the power grid. The invention adopts the hybrid energy network based on the alternating current bus and the direct current bus, combines energy metering and switching control, can effectively solve the requirement of the energy network based on the access of various energy sources of electric automobile charging, effectively solves the electric energy quality problem caused by the grid connection of a plurality of alternating current power supplies, improves the energy utilization efficiency, and utilizes energy scheduling to carry out local peak clipping and valley filling so as to realize the fine adjustment of the energy of the power grid.
Description
[ Field of technology ]
The invention belongs to the technical field of electric automobile charging and smart power grids, and particularly relates to a miniature energy network system.
[ Background Art ]
The existing electric automobile is connected with a 380Vac or 220Vac power grid through charging equipment to obtain electric energy, and when a plurality of devices are connected with the power grid, discrete loads are formed to be connected with the power grid, and the electric automobile is subjected to disordered charging to cause pollution to the power grid and reduce the utilization efficiency of the electric energy. Moreover, with the continuous development of electric vehicle charging and energy internet technology, the traditional mode that a plurality of alternating current loads are directly connected with a power grid in parallel is not applicable to electric vehicle discharging any more, and the application access of the distributed power generation and energy storage technology on a user side provides new requirements for the traditional energy network structure, so that the electric energy quality of the power grid is more negatively influenced, and the energy is more efficiently utilized.
The China patent application with the application number 201110268090.9 discloses an energy router for distributed power generation, and the scheme aims at the problems of intermittence and the like of distributed power generation, particularly renewable energy distributed power generation, and provides an energy router for coordinating and controlling various distributed power generation sources. However, the scheme is based on the energy network equipment of the alternating current bus, independent metering and control are not carried out on different energy sources, and as a plurality of power generation equipment are connected in parallel on the alternating current bus, effective control on the electric energy quality problem and optimal utilization of the energy sources are lacked, the energy utilization efficiency is improved by not utilizing the direct current bus, and the energy utilization efficiency is not effectively utilized for the electric automobile.
The Chinese patent application with publication number CN101436778A discloses a miniature power grid networking method, which adopts a direct current bus structure, all power generation units and loads are connected to the direct current bus, and are connected to a distribution network through a grid-connected inverter during grid connection. However, the method is only based on an energy network of a direct current bus, does not separately meter and control different energy sources, does not have an alternating current bus, and does not effectively utilize energy of the electric automobile.
The two most relevant documents respectively highlight descriptions related to energy networks based on alternating current buses and direct current buses, and limitations and problems exist in any mode. The single alternating current bus energy network or direct current bus energy network can not meet the existing requirements, and a miniature energy optimal utilization and interaction scheme formed by charging and discharging of an electric automobile, distributed generation, an energy storage system and the like is not adopted, and precise metering and energy management and control are not realized.
In summary, the prior art has the following problems:
(1) A single energy network based on an alternating current bus or a direct current bus cannot maximize energy utilization;
(2) The electric automobile is charged and discharged, distributed power generation, energy storage systems and other energy sources are not utilized and interacted efficiently;
(3) There is no separate metering and management for the different energy sources.
[ Invention ]
The invention aims to overcome the defects of the prior art and provide a hybrid micro energy network system based on a direct current bus and an alternating current bus.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
A miniature energy network system comprises an energy management unit and a plurality of conversion units capable of realizing unidirectional or bidirectional conversion and flow of energy in the forms of AC/DC, DC/AC and AC/AC, wherein one side of each conversion unit is connected with a power generation unit, energy storage, an electric automobile or a load, and the other side of each conversion unit is connected with a direct current bus or an alternating current bus through a metering unit and a controllable switch; the direct current bus is connected with the alternating current bus through the bidirectional DC/AC conversion unit and the controllable switch; the alternating current bus is connected with the transformer through the metering unit and the controllable switch, and the input end of the transformer is connected with the power grid; the energy management unit is electrically connected with each conversion unit, the metering unit, the controllable switch and the transformer and used for controlling the flow direction and the flow of electric energy; the power generation unit comprises a distributed alternating current power generation unit and a distributed direct current power generation unit.
The invention is further improved in that:
The transformation unit comprises a unidirectional AC/DC transformation unit, a unidirectional DC/DC transformation unit and a unidirectional DC/AC transformation unit, and the unidirectional AC/AC transformation unit, the bidirectional AC/DC transformation unit, the bidirectional DC/AC transformation unit and the bidirectional AC/AC transformation unit.
One side of the unidirectional AC/DC conversion unit is connected with the distributed AC power generation unit, and the other end of the unidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting distributed AC power generation electric energy into DC electric energy.
One side of the unidirectional DC/DC conversion unit is connected with the distributed DC power generation unit, and the other end of the unidirectional DC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting the distributed DC power generation electric energy into DC electric energy with different voltage levels.
One side of the bidirectional DC/DC conversion unit is connected with the distributed DC energy storage unit or the electric automobile, and the other end of the bidirectional DC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of one type of DC electric energy and another type of DC electric energy with different voltage levels.
One side of the bidirectional AC/DC conversion unit is connected with the distributed AC energy storage unit or the electric automobile, and the other end of the bidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of AC electric energy and DC electric energy.
One side of the bidirectional AC/AC conversion unit is connected with an electric automobile or an alternating current load, and the other end of the bidirectional AC/AC conversion unit is connected with an alternating current bus through a metering unit and a controllable switch and is used for bidirectional conversion of energy of alternating current electric energy of the electric automobile and power frequency alternating current electric energy.
One side of the bidirectional DC/AC conversion unit is connected with an electric automobile or a direct current load, and the other end of the bidirectional DC/AC conversion unit is connected with an alternating current bus through a metering unit and a controllable switch and is used for bidirectional conversion of energy of direct current electric energy and power frequency alternating current electric energy.
The distributed alternating current power generation units and the distributed direct current power generation units comprise, but are not limited to, wind power generation, photovoltaic power generation, photo-thermal power generation and fuel power generation equipment; the alternating current energy storage unit and the direct current energy storage unit comprise, but are not limited to, flywheel energy storage, storage battery packs and super capacitors; ac loads and dc loads include, but are not limited to, ac loads with supply voltages of 220Vac and 380Vac, and dc loads with voltages in the range of 200-1000 Vdc.
The power grids include, but are not limited to, power grids having voltage levels of 10kVac, 20kVac, and 35 kVac.
Compared with the prior art, the invention has the following beneficial effects:
The invention adopts the hybrid energy network based on the alternating current bus and the direct current bus, combines energy metering and switching control, can effectively solve the requirement of the energy network based on the access of various energy sources of electric automobile charging, effectively solves the electric energy quality problem caused by the grid connection of a plurality of alternating current power supplies, improves the energy utilization efficiency, and utilizes energy scheduling to carry out local peak clipping and valley filling so as to realize the fine adjustment of the energy of the power grid. According to the invention, the bidirectional energy conversion is adopted to realize the internal energy circulation, the metering and controllable switch is added to effectively control the energy, meanwhile, the direct current bus scheme is adopted to reduce the grid connection point so as to reduce the negative influence of the electric energy quality, and meanwhile, the energy utilization efficiency is improved, the distributed energy sources with different characteristics such as distributed power generation, energy storage and electric automobiles are subjected to deep fusion, the cooperative interaction among different energies is realized through the effective control of the energy, and the energy flow is controllable and efficient.
[ Description of the drawings ]
Fig. 1 is a design diagram of a micro energy network system according to the present invention.
[ Detailed description ] of the invention
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the micro energy network system of the present invention includes: the device comprises a unidirectional AC/DC conversion unit, a unidirectional DC/AC conversion unit, a unidirectional AC/AC conversion unit, a bidirectional AC/DC conversion unit, a bidirectional DC/AC conversion unit, a bidirectional AC/AC conversion unit, a direct current bus, an alternating current bus, a metering unit, a controllable switch, a transformer and an energy management unit.
One end of the unidirectional AC/DC conversion unit is connected with the distributed AC power generation unit, and the other end of the unidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting the distributed AC power generation electric energy into DC electric energy;
One end of the unidirectional DC/DC conversion unit is connected with the distributed DC power generation unit, and the other end of the unidirectional DC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting the distributed DC power generation power into DC power with different voltage levels;
one end of the unidirectional DC/AC conversion unit is connected with a direct current load, and the other end of the unidirectional DC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for converting power frequency alternating current electric energy into electric energy required by the direct current load.
One end of the unidirectional AC/AC conversion unit is connected with an alternating current load, and the other end of the unidirectional AC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for converting power frequency alternating current electric energy into electric energy required by the alternating current load.
One end of the bidirectional AC/DC conversion unit is connected with the AC energy storage unit or the electric automobile, and the other end of the bidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of AC electric energy and DC electric energy.
One end of the bidirectional DC/DC conversion unit is connected with the direct current energy storage unit or the electric automobile, and the other end of the bidirectional DC/DC conversion unit is connected with the direct current bus through the metering unit and the controllable switch and is used for bidirectionally converting the energy of one type of direct current electric energy and the energy of the other type of direct current electric energy with different voltage levels.
One end of the bidirectional DC/AC conversion unit is connected with an electric automobile or a direct current bus, and the other end of the bidirectional DC/AC conversion unit is connected with a metering unit or a controllable switch and is used for bidirectionally converting energy of direct current electric energy and power frequency alternating current electric energy.
One end of the bidirectional AC/AC conversion unit is connected with the electric automobile, and the other end of the bidirectional AC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of alternating current electric energy of the electric automobile and power frequency alternating current electric energy.
The direct current bus is used for converging direct current electric energy with the same voltage characteristics on one bus.
The alternating current buses are used for converging alternating current electric energy with the same characteristics on one bus.
The metering unit is used for metering the flow direction, the energy size and the like of alternating current electric energy or direct current electric energy.
The controllable switch is used for unidirectional or bidirectional control of the energy flowability.
One end of the transformer is connected to the alternating current bus through the controllable switch and the metering unit, and the other end of the transformer is connected with the power grid and is used for converting the power grid electric energy into power frequency alternating current electric energy.
The energy management unit is connected with all equipment such as a conversion unit, a metering unit, a controllable switch and a transformer through a communication technology, acquires information of all the equipment, and manages and controls the flow direction and the flow of electric energy, so that the energy of the distributed direct current/alternating current power generation unit directly flows to an electric automobile or an alternating current/direct current energy storage unit through a direct current bus, or the direct current energy of the alternating current/direct current energy storage unit directly interacts with the electric energy of the electric automobile through the direct current bus, and the energy of the distributed power generation unit, the energy storage unit and the electric automobile directly flows to other electric automobiles or loads of the same alternating current bus through the alternating current bus after being converted through the direct current bus and DC/AC.
The principle of the invention is as follows:
The invention also has an energy network based on the direct current bus and the alternating current bus, and the energy connected to the direct current bus and the alternating current bus can respectively realize local energy interaction, thereby realizing the on-site energy absorption and the high-efficiency utilization. The energy bidirectional conversion unit is adopted to realize the bidirectional conversion and flow of energy in various forms of AC/DC, DC/DC, DC/AC and AC/AC. Each conversion unit is connected with a metering unit and a controllable switch, so that energy fine metering and management and control are realized. The distributed energy sources with different characteristics such as distributed power generation, energy storage and electric automobiles are formed into a direct-current micro-grid, energy is efficiently utilized and managed through the energy management unit, and meanwhile, the number of power frequency alternating-current parallel grid points is reduced, and negative influence on the quality of a power grid is reduced.
The energy management unit acquires all equipment information of the micro-grid in an omnibearing manner, and schedules distributed power generation, energy storage and energy sources of other electric vehicles to meet the requirements according to the requirements of electric vehicle charging or loading; according to the peak-to-valley characteristics of the power consumption in the micro-grid, dispatching distributed power generation, energy storage and electric vehicle charging and discharging to realize peak clipping and valley filling in the micro-grid; according to the peak-to-valley characteristics of the power grid, the distributed power generation, the energy storage and the electric automobile discharge are scheduled during peak time to realize no power taking or less power taking to the power grid, and the power is used more during low-peak time to realize peak clipping and valley filling to the power grid; according to the configuration capacity of the transformer and the electricity consumption requirement condition of the load in the micro-grid, distributed power generation, energy storage and electric automobile discharging are dynamically scheduled, so that the capacity of the micro-grid does not exceed the capacity of the voltage device, and the small-capacity transformer meets the large-capacity electricity consumption load requirement.
The function of each conversion unit of the invention:
Unidirectional AC/DC conversion unit: one-way conversion of alternating current into direct current, alternating voltage includes, but is not limited to, 220Vac or 380Vac.
Unidirectional DC/DC conversion unit: one-way conversion of direct current of one voltage range into direct current of another voltage range.
Unidirectional DC/AC conversion unit: one-way conversion of direct current in a voltage range into power frequency alternating current.
Unidirectional AC/AC conversion unit: one-way conversion of alternating current into alternating current, alternating voltage including but not limited to 220Vac or 380Vac, includes equality of voltages before and after conversion.
Bidirectional AC/DC conversion unit: alternating current and direct current are bi-directionally transformed, and alternating voltages include, but are not limited to, 220Vac or 380Vac.
Bidirectional DC/DC conversion unit: a bidirectional conversion of direct current in a voltage range with direct current in another voltage range includes equality of voltage values before and after conversion.
Bidirectional DC/AC conversion unit: direct current and power frequency alternating current in a voltage range are converted in a bidirectional mode.
Bidirectional AC/AC conversion unit: bidirectional conversion of alternating current with another alternating current, the alternating current voltage including but not limited to 220Vac or 380Vac, includes the voltage values being equal before and after conversion.
Direct current bus, alternating current bus: the dc bus voltage range is 200-1000Vdc and the ac bus is 380Vac including but not limited to metal bars, cables, connectors.
Metering unit: ac metering and dc metering, a unit that meters the flow direction and flow of electrical energy, while feeding back values of voltage, current, phase, active, reactive, power factor, frequency, direction and magnitude of electrical energy, including but not limited to sensors, metering modules or meters.
And (2) a controllable switch: all switches with feedback node signals.
A transformer: the device for converting the electric power of the electric network into 380Vac is not limited to 10kVac,20kVac and 35kVac.
An energy management unit: the unit has communication function and can perform data acquisition, analysis and processing capability. Including but not limited to a module or device containing an MCU or CPU. Communication mode: wired, wireless, or power line carrier.
A distributed ac/dc power generation unit including, but not limited to, wind power generation, photovoltaic power generation, photo-thermal power generation, fuel power generation, etc.;
The ac/dc energy storage unit includes, but is not limited to, flywheel energy storage, battery pack, super capacitor, etc.
Electric vehicles, including pure electric vehicles and hybrid electric vehicles that can be ac charged or discharged.
Ac/dc loads, including but not limited to loads with supply voltages 220vac,380vac, dc loads with voltages in the range of 200-1000 Vdc.
The power grid, including but not limited to, power grids having voltage levels of 10kVac,20kVac,35 kVac.
The conversion units of the invention can adopt conversion units with metering units and controllable switches, and the external metering units and controllable switches are not needed. Meanwhile, the alternating current bus can be directly connected with a 380Vac power grid without a transformer; the connection of each conversion unit, the metering unit and the controllable switch is not sequential; the electric automobile can be used as an energy storage unit and connected with the conversion unit.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (3)
1. The miniature energy network system is characterized by comprising a unidirectional AC/DC conversion unit, a unidirectional DC/AC conversion unit, a unidirectional AC/AC conversion unit, a bidirectional AC/DC conversion unit, a bidirectional DC/AC conversion unit, a bidirectional AC/AC conversion unit, a direct current bus, an alternating current bus, a metering unit, a controllable switch, a transformer and an energy management unit; the direct current bus is connected with the alternating current bus through the bidirectional DC/AC conversion unit and the controllable switch; the alternating current bus is connected with the transformer through the metering unit and the controllable switch, and the input end of the transformer is connected with the power grid; the energy management unit is electrically connected with each conversion unit, each metering unit, each controllable switch and each transformer, is used for controlling the flow direction and the flow of electric energy, and is used for dispatching the energy sources of the distributed power generation units, the energy storage units and other electric vehicles according to the charging or load requirements of the electric vehicles so as to meet the requirements; according to the peak-to-valley characteristics of the power consumption in the micro energy network system, the distributed power generation unit, the energy storage unit and the electric vehicle are scheduled to charge and discharge to realize peak clipping and valley filling in the micro energy network system; according to the peak-to-valley characteristics of the power grid, the distributed power generation unit, the energy storage unit and the electric automobile are scheduled to discharge at peak time to realize no power taking or less power taking to the power grid, and the power is used for a plurality of purposes at valley time; dynamically scheduling the discharge of the distributed power generation unit, the energy storage unit and the electric automobile according to the configuration capacity of the transformer and the power consumption requirement condition of the load in the micro-grid; the distributed power generation unit comprises a distributed alternating current power generation unit and a distributed direct current power generation unit; the energy storage unit comprises an alternating current energy storage unit and a direct current energy storage unit;
one end of the unidirectional AC/DC conversion unit is connected with the distributed AC power generation unit, and the other end of the unidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting the distributed AC power generation electric energy into DC electric energy;
One end of the unidirectional DC/DC conversion unit is connected with the distributed DC power generation unit, and the other end of the unidirectional DC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for converting the distributed DC power generation electric energy into DC electric energy with different voltage levels;
one end of the unidirectional DC/AC conversion unit is connected with a direct current load, and the other end of the unidirectional DC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for converting power frequency alternating current electric energy into electric energy required by the direct current load;
one end of the unidirectional AC/AC conversion unit is connected with an alternating current load, and the other end of the unidirectional AC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for converting power frequency alternating current electric energy into electric energy required by the alternating current load;
One end of the bidirectional AC/DC conversion unit is connected with the AC energy storage unit or the electric automobile, and the other end of the bidirectional AC/DC conversion unit is connected with the DC bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of AC electric energy and DC electric energy;
One end of the bidirectional DC/DC conversion unit is connected with the direct current energy storage unit or the electric automobile, and the other end of the bidirectional DC/DC conversion unit is connected with the direct current bus through the metering unit and the controllable switch and is used for bidirectionally converting the energy of one type of direct current electric energy and the energy of the other type of direct current electric energy with different voltage levels;
One end of the bidirectional DC/AC conversion unit is connected with the electric automobile, and the other end of the bidirectional DC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of direct current electric energy and power frequency alternating current electric energy;
One end of the bidirectional AC/AC conversion unit is connected with the electric automobile, and the other end of the bidirectional AC/AC conversion unit is connected with an alternating current bus through the metering unit and the controllable switch and is used for bidirectional conversion of energy of alternating current electric energy of the electric automobile and power frequency alternating current electric energy.
2. The micro energy network system of claim 1, wherein the distributed ac power generation unit and the distributed dc power generation unit comprise wind power generation, photovoltaic power generation, photo-thermal power generation, and fuel power generation equipment; the alternating current energy storage unit and the direct current energy storage unit comprise flywheel energy storage, a storage battery pack and a super capacitor; the ac load and the dc load include ac loads of which supply voltages are 220Vac and 380Vac, and dc loads of which voltage ranges from 200 to 1000 Vdc.
3. The micro energy network system of claim 1, wherein the power grid comprises power grids having voltage levels of 10kVac, 20kVac, and 35 kVac.
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| CN201610972103.3A CN106374533B (en) | 2016-10-28 | 2016-10-28 | Miniature energy network system |
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| CN201610972103.3A CN106374533B (en) | 2016-10-28 | 2016-10-28 | Miniature energy network system |
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| CN106911130A (en) * | 2017-05-05 | 2017-06-30 | 广东工业大学 | A kind of energy router |
| CN107947168A (en) * | 2017-12-05 | 2018-04-20 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of interface circuit of movable type micro-grid system |
| CN108183505A (en) * | 2018-01-08 | 2018-06-19 | 三峡大学 | A kind of multilayer micro-grid system provided multiple forms of energy to complement each other |
| CN108448699A (en) * | 2018-03-29 | 2018-08-24 | 西安特锐德智能充电科技有限公司 | The charge/discharge control method of direct current micro-grid system and its electric vehicle |
| CN108683183A (en) * | 2018-05-28 | 2018-10-19 | 深圳市脉联电子有限公司 | A kind of novel electricity using at the peak time metering method |
| CN109474009A (en) * | 2018-11-13 | 2019-03-15 | 中国电力科学研究院有限公司 | A kind of distributed energy transmission control system |
| CN110138008A (en) * | 2019-05-29 | 2019-08-16 | 哈尔滨工业大学 | Using the electric power energy router of power line carrier communication |
| CN110912183B (en) * | 2019-10-31 | 2023-12-22 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing various renewable energy sources |
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