CN110535137A - A kind of intelligent energy system based on electric power electric transformer - Google Patents
A kind of intelligent energy system based on electric power electric transformer Download PDFInfo
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- CN110535137A CN110535137A CN201910788532.9A CN201910788532A CN110535137A CN 110535137 A CN110535137 A CN 110535137A CN 201910788532 A CN201910788532 A CN 201910788532A CN 110535137 A CN110535137 A CN 110535137A
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- converter
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- transformer
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Classifications
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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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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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to electric power intelligent energy system fields, and a kind of intelligent energy system based on electric power electric transformer is disclosed, including electric power electric transformer, AC/DC converter, AC/AC converter, DC/AC converter, DC/DC converter, photovoltaic distributed power supply, electric car, energy-storage system, DC load, AC load, a variety of alternating current generators.The intelligent energy system based on electric power electric transformer, pass through AC/DC converter, two-way DC/DC DC converter, AC/DC converter constitutes electric power electric transformer mould group, so that electric power electric transformer may be implemented for DC low-voltage, AC low-tension, high direct voltage, conversion between these four states of ac high-voltage, it may be only available for single-frequency compared to traditional transformer, the transmitting of unidirectional voltage, electric power electric transformer almost can be adapted for the voltage bi-directional under all situations, and in terms of realizing frequency and voltage transformation very flexibly, can effectively blocking transformer both ends failure transmitting.
Description
Technical field
The present invention relates to electric power intelligent energy system field, specially a kind of wisdom energy based on electric power electric transformer
System.
Background technique
Intelligent energy system needs a series of support of energy infrastructures and advanced information and communication technology (ICT), should be to pass
Key technology innovated, lift technique feasibility, is made great efforts to reduce cost again, is improved economic feasibility, to realize these targets,
It needs to carry out technological innovation, the key technology for being related to intelligent energy system mainly includes electric power electric transformer, energy routing
Device, burning natural gas distributed power apparatus, energy storage technology etc..
The main function of traditional transformer is transformation and isolation, is had a single function, and there are a series of problems, for example, iron core
Saturation can generate harmonic wave, cause larger excitation surge current when putting into power grid, and voltage decline etc., institute are caused in transformer overload
With, traditional transformer is generally only applicable to the unidirectional power transmission and transformation process of traditional power grid, and not flexible in terms of frequency and voltage transformation,
It is easy to cause the failure at transformer both ends to transmit, and in the microgrid of the wisdom energy, there are two-way flows for electric energy, it is necessary to intelligence
There is the intelligent energy electric power electric transformer of preferable compatibility to realize transformation, for this purpose, providing a kind of based on electric power electric transformer
Intelligent energy system.
Summary of the invention
The present invention provides a kind of intelligent energy systems based on electric power electric transformer, have Medial & Low Voltage Power Network and tradition
Between bulk power grid the advantages of shared and information the two-way flow of energy, solves the technical issues of mentioning in background technique.
The invention provides the following technical scheme: a kind of intelligent energy system based on electric power electric transformer, including electric power
Electronic transformer, AC/DC converter, AC/AC converter, DC/AC converter, DC/DC converter, photovoltaic distributed power supply,
Electric car, energy-storage system, DC load, AC load, a variety of alternating current generators；The energy-storage system and DC/AC converter
Electrical connection, the DC/AC converter are electrically connected by 380V ac bus with electric power electric transformer；The photovoltaic equal distribution
Formula power supply is electrically connected with DC/AC converter, and the DC/AC converter passes through 380V/ ac bus and electric power electric transformer electricity
Connection；The electric car is electrically connected with AC/DC converter, and the AC/DC converter passes through 380V ac bus and electric power electricity
Sub- transformer electrical connection；The AC load is electrically connected with AC/AC converter, and the AC/AC converter is exchanged female by 380V
Line is electrically connected with electric power electric transformer；The DC load is electrically connected with DC/DC converter, and the DC/DC converter passes through
220V DC bus is electrically connected with electric power electric transformer；A variety of alternating current generators are electrically connected with AC/DC converter, described
AC/DC converter is electrically connected by 220V DC bus with electric power electric transformer.
Preferably, the AC/DC converter, two-way DC/DC DC converter, AC/DC converter constitute power electronics and become
Depressor mould group, electric power electric transformer is for the conversion between high pressure and low pressure, the conversion being also used between direct current and alternating current,
The electric power electric transformer is for the conversion between DC low-voltage, AC low-tension, high direct voltage, ac high-voltage these four states.
Preferably, the electric power electric transformer is equal by photovoltaic distributed power supply, electric car charging, energy storage device etc.
It is connected to the grid.
Preferably, the electric power electric transformer can carry out second level boosting, be linked into 35kV ac bus or 50kV direct current
Bus, and two electronic transformers are equipped with communication line.
The present invention have it is following the utility model has the advantages that
1, it is somebody's turn to do the intelligent energy system based on electric power electric transformer, by AC/DC converter, two-way DC/DC DC converter,
AC/DC converter and electric power electric transformer constitute electric power electric transformer mould group, allow electric power electric transformer real
The current conversion between DC low-voltage, AC low-tension, high direct voltage, ac high-voltage these four states, to meet distributed electrical
The demand of the flexible access electric system such as source device, energy-storage system may be only available for single-frequency, unidirectional compared to traditional transformer
The transmitting of voltage, electric power electric transformer almost can be adapted for the voltage bi-directional under all situations, and realize frequency
It is very flexible in terms of rate and voltage transformation, can effective blocking transformer both ends failure transmitting.
2, it is somebody's turn to do the intelligent energy system based on electric power electric transformer, is incorporated to energy storage device by electric power electric transformer
Power grid realizes the Bidirectional Conduction of direct current and alternating current, in the system effect of two-way DC/DC DC converter be can be excellent
Change charge and discharge process, improve battery shelf-life and efficiency for charge-discharge and battery and DC bus is isolated, controllability is more
It is good, it is not only able to improve the power supply quality of user, and the harmonic wave to power grid and idle pollution can be reduced, improves system
Safety.
3, should intelligent energy system based on electric power electric transformer, by electric power electric transformer, AC/DC converter,
The design of AC/AC converter, DC/AC converter, DC/DC converter not only provides ac bus, but also provides DC bus, works as electricity
When net breaks down, burning natural gas distributed power apparatus or energy-storage system power generation can provide electricity by DC bus and ac bus
Can, guarantee user's uninterrupted power supply, further ensured power grid power supply reliability, meanwhile, it is capable to realize single-phase and three-phase mutual
Phase inversion preferably meets user demand；And have the function of connected network communication, it can be realized with power distribution network, the other equipment of power distribution network
Interaction, is conducive to the coordinated control of electric network swim.
Detailed description of the invention
Fig. 1 is intelligent energy system main frame schematic diagram of the present invention；
Fig. 2 is electric power electric transformer modular structure schematic illustration of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of intelligent energy system based on electric power electric transformer referring to FIG. 1-2, including electric power electric transformer,
AC/DC converter, AC/AC converter, DC/AC converter, DC/DC converter, photovoltaic distributed power supply, electric car, storage
It can system, DC load, AC load, a variety of alternating current generators；Energy-storage system is electrically connected with DC/AC converter, DC/AC conversion
Device is electrically connected by 380V ac bus with electric power electric transformer；Photovoltaic distributed power supply is electrically connected with DC/AC converter
It connects, DC/AC converter is electrically connected by 380V/ ac bus with electric power electric transformer；Electric car and AC/DC converter electricity
Connection, AC/DC converter are electrically connected by 380V ac bus with electric power electric transformer；AC load and AC/AC converter
Electrical connection, AC/AC converter are electrically connected by 380V ac bus with electric power electric transformer；DC load and DC/DC are converted
Device electrical connection, DC/DC converter are electrically connected by 220V DC bus with electric power electric transformer；A variety of alternating current generators with
The electrical connection of AC/DC converter, AC/DC converter are electrically connected by 220V DC bus with electric power electric transformer.
Wherein, AC/DC converter, two-way DC/DC DC converter, AC/DC converter constitute electric power electric transformer mould
Group, electric power electric transformer are not only able to achieve the conversion between high pressure and low pressure, moreover it is possible to realize and turn between direct current and alternating current
Change, electric power electric transformer for the conversion between DC low-voltage, AC low-tension, high direct voltage, ac high-voltage these four states, from
And the needs of flexible access electric system such as meet burning natural gas distributed power apparatus, energy-storage system；Electric power electric transformer it is small in size and
Light-weight, the size of traditional transformer is mainly determined by core dimensions, and iron core size and working frequency are in inverse ratio, power electronics
Transformer greatly reduces volume by improving working frequency, alleviates weight, is suitable for intelligent energy system magnanimity equipment
The characteristics of.
Electric power electric transformer can realize the two directions' inputing of voltage, output, and take into account Fault Isolation function；Two-way DC/DC
DC converter is made of DC/AC converter, AC/AC converter, AC/DC converter, currently, existing different control methods application
In the control of two-way DC/DC DC converter, control strategy is as follows:
Phase-shifting control method: phase-shifting control method is that a kind of control mode of power is transmitted by changing phase shifting angle, basic
Working principle is: half period is connected in the switching tube complementation on each bridge arm, i.e. the angle of flow is 180 degree, leads between two bridge arms
One phase of logical difference, this phase is exactly phase shifting angle.By controlling the positive and negative transmission direction to change power of phase shifting angle, lead to
The size of control phase shifting angle is crossed to control the size of output voltage, the two-way DC/DC converter of mode of resonance uses phase shifting control side
Method has many advantages, such as that system inertia is small, steady-state performance is preferable, dynamic responding speed is very fast, but due in phase shifting control, when defeated
When entering voltage can not match with output voltage generation amplitude, it will increase the current stress of switching tube, generate biggish circulation energy,
So that the efficiency of converter is influenced by input and output voltage ratio and reduced, while voltage gain is always≤1, when duty ratio about
When being 50%, for the cut-off current of leading-bridge switching tube close to resonance current maximum value, turn-off power loss is larger, and circulation increases, transformation
Device efficiency reduces.
Method for controlling frequency conversion: the principle of method for controlling frequency conversion is led to according to input voltage, output voltage and the variation of load
Overregulating switching frequency makes output voltage maintain to stablize.When input voltage transformation range is wider or load change is bigger,
Switching frequency amplitude of variation is also bigger, and the two-way DC/DC converter of mode of resonance uses method for controlling frequency conversion, switching frequency operation
When near resonance frequency, inverse cascade can be realized no-voltage conducting, and rectification stage can be realized zero-current switching, and loop current subtracts
Small, power loss becomes smaller, and working efficiency is got higher.
Phase shift adds method for controlling frequency conversion: the advantages of phase shift adds method for controlling frequency conversion to combine phase shifting control and frequency control,
By adjusting the angle of flow and switching frequency of converter switches pipe simultaneously, converter is enable to keep zero electricity while pressure stabilizing output
Pressure conducting Sofe Switch work, converter adjustable range in wide input voltage and wide load variation range is broader, and has and open
The advantages that loss is low, high-efficient is closed, however switching frequency operation range is relatively narrow, control system is complicated is not easy to realize.
The present invention is based on the electric power electric transformers of power electronic technique as novel intelligent power grid, the core of energy internet
Heart equipment has voltage class transformation, electrical isolation, provides alternating current-direct current and network interface for distributed generation resource and energy-storage system etc.
Function, realize shared and information the two-way flow of energy between Medial & Low Voltage Power Network and traditional bulk power grid.
Wherein, photovoltaic distributed power supply, electric car charging, energy storage device etc. are incorporated to electricity by electric power electric transformer
Net；Photovoltaic distributed power supply is connected to the grid by electric power electric transformer, realizes conversion of the low-voltage AC to High Level AC Voltage；
Electric car charging is connected to the grid by electric power electric transformer, realizes conversion of the low-voltage AC to low-voltage DC；By double
Transmission to DC/DC DC converter control energy.When electric car work, two-way DC/DC DC converter applies energy
Enough improve the driveability of motor；When braking automobile or deceleration, electric energy is converted by the mechanical energy of braking and passes through two-way DC/
DC DC converter feeds back to battery, to economize on resources, optimal control；Energy storage device is incorporated to electricity by electric power electric transformer
Net realizes the Bidirectional Conduction of direct current and alternating current；The effect of two-way DC/DC DC converter is can to optimize in the system
Charge and discharge process improves battery shelf-life and efficiency for charge-discharge and battery and DC bus is isolated, improves system
Safety.
By the second level boosting of 2 electric power electric transformers, it is linked into 35kV ac bus or 50kV DC bus, with full
The ac and dc systems of sufficient different voltages grade access, and two electric power electric transformers are equipped with communication line, with networking
Communication function can interact with power distribution network, the other equipment realizations of power distribution network, be conducive to the coordinated control of electric network swim.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of intelligent energy system based on electric power electric transformer, it is characterised in that: including electric power electric transformer, AC/
DC converter, AC/AC converter, DC/AC converter, DC/DC converter, photovoltaic distributed power supply, electric car, energy storage system
System, DC load, AC load, a variety of alternating current generators；The energy-storage system is electrically connected with DC/AC converter, the DC/AC
Converter is electrically connected by 380V ac bus with electric power electric transformer；The photovoltaic distributed power supply and DC/AC are converted
Device electrical connection, the DC/AC converter are electrically connected by 380V/ ac bus with electric power electric transformer；The electric car
It is electrically connected with AC/DC converter, the AC/DC converter is electrically connected by 380V ac bus with electric power electric transformer；Institute
It states AC load to be electrically connected with AC/AC converter, the AC/AC converter passes through 380V ac bus and electric power electric transformer
Electrical connection；The DC load is electrically connected with DC/DC converter, and the DC/DC converter passes through 220V DC bus and electric power
Electronic transformer electrical connection；A variety of alternating current generators are electrically connected with AC/DC converter, and the AC/DC converter passes through
220V DC bus is electrically connected with electric power electric transformer.
2. a kind of intelligent energy system based on electric power electric transformer according to claim 1, it is characterised in that: described
AC/DC converter, two-way DC/DC DC converter, AC/DC converter constitute electric power electric transformer mould group, and power electronics becomes
Depressor is for the conversion between high pressure and low pressure, the conversion being also used between direct current and alternating current, the electric power electric transformer
For the conversion between DC low-voltage, AC low-tension, high direct voltage, ac high-voltage these four states.
3. a kind of intelligent energy system based on electric power electric transformer according to claim 1, it is characterised in that: described
Photovoltaic distributed power supply, electric car charging, energy storage device etc. are connected to the grid by electric power electric transformer.
4. a kind of intelligent energy system based on electric power electric transformer according to claim 1, it is characterised in that: described
Electric power electric transformer can carry out second level boosting, be linked into 35kV ac bus or 50kV DC bus, and two electronic transformers
Device is equipped with communication line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910788532.9A CN110535137A (en) | 2019-08-26 | 2019-08-26 | A kind of intelligent energy system based on electric power electric transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910788532.9A CN110535137A (en) | 2019-08-26 | 2019-08-26 | A kind of intelligent energy system based on electric power electric transformer |
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| CN110535137A true CN110535137A (en) | 2019-12-03 |
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| CN201910788532.9A Pending CN110535137A (en) | 2019-08-26 | 2019-08-26 | A kind of intelligent energy system based on electric power electric transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864801A (en) * | 2020-08-12 | 2020-10-30 | 阳光电源股份有限公司 | Photovoltaic power station and control method thereof |
| CN112003337A (en) * | 2020-09-22 | 2020-11-27 | 广东电网有限责任公司 | Alternating current-direct current hybrid system framework of industrial park distribution network |
| CN112152261A (en) * | 2020-09-23 | 2020-12-29 | 广东电网有限责任公司东莞供电局 | Power distribution network system based on power electronic transformer alternating current-direct current hybrid networking |
| CN114825451A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Light-storage micro-grid flexible networking system for thermal power plant |
| CN114844116A (en) * | 2022-07-04 | 2022-08-02 | 西安热工研究院有限公司 | In-plant photovoltaic and comprehensive energy load system and control method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680488A (en) * | 2016-01-27 | 2016-06-15 | 东南大学 | MMC (modular multiple converter) type multi-port power electronic transformer applied to alternating current/direct current hybrid power distribution network |
-
2019
- 2019-08-26 CN CN201910788532.9A patent/CN110535137A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680488A (en) * | 2016-01-27 | 2016-06-15 | 东南大学 | MMC (modular multiple converter) type multi-port power electronic transformer applied to alternating current/direct current hybrid power distribution network |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864801A (en) * | 2020-08-12 | 2020-10-30 | 阳光电源股份有限公司 | Photovoltaic power station and control method thereof |
| CN112003337A (en) * | 2020-09-22 | 2020-11-27 | 广东电网有限责任公司 | Alternating current-direct current hybrid system framework of industrial park distribution network |
| CN112152261A (en) * | 2020-09-23 | 2020-12-29 | 广东电网有限责任公司东莞供电局 | Power distribution network system based on power electronic transformer alternating current-direct current hybrid networking |
| CN114825451A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Light-storage micro-grid flexible networking system for thermal power plant |
| CN114844116A (en) * | 2022-07-04 | 2022-08-02 | 西安热工研究院有限公司 | In-plant photovoltaic and comprehensive energy load system and control method thereof |
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Effective date of registration: 20220930 Address after: 226299 No. 500, Linyang Road, Qidong Economic Development Zone, Qidong City, Nantong City, Jiangsu Province Applicant after: Qidong wotai new energy Co.,Ltd. Address before: 211100 West Unit of Block D, Jinzhi Science and Technology Park, 100 General Avenue, Jiangning District, Nanjing City, Jiangsu Province (Jiangning Development Zone) Applicant before: JIANGSU HUIZHI ENERGY ENGINEERING TECHNOLOGY INNOVATION RESEARCH INSTITUTE Co.,Ltd. |
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Application publication date: 20191203 |