CN111509834A - Comprehensive energy alternating current-direct current dual-power supply system - Google Patents
Comprehensive energy alternating current-direct current dual-power supply system Download PDFInfo
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- CN111509834A CN111509834A CN202010429872.5A CN202010429872A CN111509834A CN 111509834 A CN111509834 A CN 111509834A CN 202010429872 A CN202010429872 A CN 202010429872A CN 111509834 A CN111509834 A CN 111509834A
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- power
- power supply
- ats switch
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- ac220v
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/51—Photovoltaic means
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an integrated energy AC/DC dual-power supply system, which comprises a power electronic transformer, a photovoltaic power generation system, a first ATS switch, a second ATS switch, an energy storage system and an AC220V power grid, wherein the power electronic transformer is connected with the photovoltaic power generation system through a power line; the AC220V power grid is connected with a first ATS switch and a second ATS switch, the power electronic transformer is connected with the photovoltaic power generation system, the first ATS switch and the second ATS switch, the first ATS switch is connected with a plurality of alternating current loads, the second ATS switch is connected with a plurality of direct current loads, and the stored energy system is connected between the first ATS switch and the power electronic transformer. The invention adopts a multi-port multi-flow power electronic transformer as a core conversion component of an AC/DC dual-power supply system, an ATS power supply changeover switch as a core switch device, and a corresponding protection control system is configured to realize stable and efficient operation of the system, so that renewable energy sources such as photovoltaic and the like can be effectively consumed and utilized, and continuity and reliability of power utilization of users are ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of dual-power supply, in particular to an integrated energy alternating current-direct current dual-power supply system.
Background
With the development of new energy technology, more and more electric vehicles replace fuel engine automobiles, zero emission, low noise and no pollution can be realized, and increasingly exhausted petroleum energy can be greatly saved, so that the development of the electric vehicles is increasingly strong, but the electric vehicles need to be developed and built vigorously to really run and develop a power control system of the electric vehicle direct-current charging pile, and an important reason for hindering the popularization and application of the electric vehicles at present is the construction of the charging pile. The existing charging piles are divided into two types, one type is an alternating current charging pile, and the other type is a direct current charging pile; the charging time of the direct current charging pile is shorter than that of the alternating current charging pile, so that the direct current charging pile is popular with customers easily.
Distributed energy such as photovoltaic power generation has become the development trend of future energy systems at present, and more users install photovoltaic power generation system, and new energy automobile and the important supplementary as clean electric wire netting of the direct current charging stake of energetically developing, other direct current consumer gradually increase and have walked home user, like direct current air conditioner, direct current illumination.
A brand-new AC/DC dual-power supply system is urgently needed to be designed, the requirements of a user on DC load and AC load are met, and new energy resources such as photovoltaic power generation and the like are effectively consumed and utilized. In the aspect of research of an alternating current-direct current dual-power supply system, a definite scheme is not provided for a scheme that a user combines comprehensive energy to provide dual power supplies for the user.
Disclosure of Invention
Therefore, the embodiment of the invention provides an integrated energy AC/DC dual-power supply system, which aims to solve the problems that a power supply system in the prior art cannot meet the requirements of a DC load and an AC load of a user and can effectively consume and utilize new energy such as photovoltaic power generation and the like.
In order to achieve the above object, an embodiment of the present invention provides the following:
in one aspect of the embodiment of the invention, an integrated energy source alternating current-direct current dual-power supply system is provided, which comprises a power electronic transformer, a photovoltaic power generation system, a first ATS switch, a second ATS switch, an energy storage system and an AC220V power grid;
the AC220V power grid is connected with a first ATS switch and a second ATS switch, the power electronic transformer is connected with a photovoltaic power generation system, the first ATS switch and the second ATS switch, the first ATS switch is connected with a plurality of alternating current loads, the second ATS switch is connected with a plurality of direct current loads, and the energy storage system is connected between the first ATS switch and the power electronic transformer.
As an alternative of the present invention, the AC220V grid is connected to the second ATS switch via an AC/DC converter.
As an optional scheme of the invention, the alternating current loads are all 220V alternating current loads.
As a field selection scheme of the invention, the direct current loads are all 750V direct current charging piles.
As an alternative of the present invention, the power electronic transformer is a three-port power electronic transformer, and includes a photovoltaic input terminal, an AC220V port and a DC750V port, the photovoltaic system is connected to the photovoltaic input terminal, the first ATS switch is connected to the AC220V port, and the second ATS switch is connected to the DC750V port.
As an alternative of the present invention, the AC220V port has a bidirectional energy flow function, and the energy storage system is connected to the AC220V port to store electric energy.
The power electronic transformer, the first ATS switch and the second ATS switch are connected, the protection control system is used for setting and selecting a main power supply and a standby power supply, and the standby power supply is automatically switched to supply power after the main power supply is powered off.
As an optional scheme of the present invention, the photovoltaic power generation system is a main power source, and the AC220V power grid is a backup power source.
As an alternative scheme of the present invention, the AC220V power grid is a main power supply, and the photovoltaic power generation system is a backup power supply.
As an alternative of the present invention, the photovoltaic power generation system and the AC220V power grid are supplied with power independently.
The embodiment of the invention has the following advantages:
the invention adds another power supply which mainly comprises a photovoltaic power generation system as supplement under the condition that a user is accessed to a conventional alternating current distribution network to form an alternating current-direct current dual-power supply system of comprehensive energy. A multi-port multi-flow power electronic transformer is used as a core conversion component of an alternating current-direct current dual-power supply system, an ATS power supply change-over switch is used as a core switch device, a corresponding protection control system is configured to realize stable and efficient operation of the system, renewable energy sources such as photovoltaic and the like can be effectively consumed and utilized, and continuity and reliability of power utilization of users are guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic diagram of system connection provided in the embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides an integrated energy AC/dc dual power supply system, which includes a power electronic transformer, a photovoltaic power generation system, two ATS switches (which is the first ATS switch and the second ATS switch, respectively), an energy storage system, and an AC220V power grid;
the AC220V power grid is connected with a first ATS switch and a second ATS switch, the power electronic transformer is connected with a photovoltaic power generation system, a first ATS switch and a second ATS switch, the first ATS switch is connected with a plurality of alternating current loads, the second ATS switch is connected with a plurality of direct current loads, the energy storage system is connected between the first ATS switch and the power electronic transformer, and the AC220V power grid is connected with the second ATS switch through an AC/DC converter; the alternating current loads are 220V alternating current loads; and the direct current loads are 750V direct current charging piles.
The power electronic transformer is a three-port power electronic transformer and comprises a photovoltaic input end, an AC220V port and a DC750V port, wherein the photovoltaic system is connected to the photovoltaic input end, the first ATS switch is connected to the AC220V port, and the second ATS switch is connected to the DC750V port.
Wherein the AC220V port has energy bidirectional flow function, and the energy storage system is connected with the AC220V port to store electric energy.
The power supply system further comprises a protection control system, the protection control system is connected with the power electronic transformer, the first ATS switch and the second ATS switch, the protection control system is used for setting and selecting the main power supply and the standby power supply, and when the main power supply is powered off, the standby power supply is automatically switched to supply power.
The photovoltaic power generation system is a main power supply, and the AC220V power grid is a standby power supply; or the AC220V power grid is a main power supply, and the photovoltaic power generation system is a standby power supply. And the photovoltaic power generation system and the AC220V power grid supply power independently.
The energy storage system of the embodiment comprises an energy storage element, an energy storage converter and a first charging module.
The primary charging module comprises an energy storage direct current side contact S and an energy storage alternating current side contact S, the energy storage direct current side contact S is detachably connected between the energy storage converter and the energy storage element, and the energy storage alternating current side contact S is detachably connected between the energy storage converter and the power grid side. The first charging module is used for charging the energy storage element for the first time. In one example, the primary charging module is configured to convert ac power transmitted from a power grid side into dc power, and perform primary charging on the energy storage element using the dc power.
When the energy storage element is charged for the first time, the energy storage converter is disconnected, and the energy storage element is charged only by the first charging module. After the energy storage element is charged for the first time by the first charging module, if the energy storage element needs to be charged for the second time, the energy storage element is charged for the third time, and the energy storage element is charged, so that the electric energy on the power grid side is converted by the energy storage converter, transmitted and charged for the energy storage element.
When charging for the first time, the energy storage direct current side contact S of the first charging module is connected between the energy storage converter and the energy storage element, and the energy storage alternating current side contact S of the first charging module is connected between the energy storage converter and the power grid side, so that the energy storage element can be charged for the first time by the first charging module. The energy storage element can convert the variable current electric energy at the power grid side into direct current electric energy, so that the energy storage element is charged safely for the first time, the energy storage converter or the energy storage element is prevented from being damaged, and the safety of the whole energy storage system is ensured.
In the above embodiment, the number of the energy storage elements in the energy storage system may be more than two, the number of the energy storage converters is the same as the number of the energy storage elements, and one energy storage element is correspondingly configured and connected to one energy storage converter. In an energy storage system in which the number of energy storage elements is two or more, the first-time charging module may be configured in a number smaller than the number of energy storage elements. For example, a first charging module is arranged in the energy storage system, and when a certain energy storage element in the energy storage system needs to be charged for the first time, an energy storage direct current side contact S and an energy storage alternating current side contact S of the first charging module are connected between the energy storage element needing to be charged for the first time and the energy storage converter, and between the energy storage converter and the power grid side. After this energy storage component finishes charging for the first time, and other energy storage components in the energy storage system also need charge for the first time, can dismantle energy storage stream side contact and energy storage AC side contact S of the module of charging for the first time around the energy storage component that has accomplished charging for the first time. And the primary charging module is connected with the energy storage element needing primary charging, the corresponding energy storage converter and the power grid side. Therefore, the number of the first charging modules required to be arranged is reduced, the structure of the energy storage system for charging the energy storage element is simplified, and the cost of the energy storage system for charging the energy storage element for the first time is reduced.
The alternating current and direct current hybrid power supply system can integrate alternating current and direct current hybrid power supply, new energy and energy storage technologies into a system according to the requirements of users, the alternating current and direct current dual-power supply system is simple in structure, two paths of mutually independent power supplies are arranged in the system and are respectively a conventional alternating current power grid and a photovoltaic power generation system, alternating current and direct current output can be provided at the same time, and reliable and economical alternating current and direct current power supply is provided for the users by effectively combining an alternating current power grid power supply, the new energy and the energy.
The invention adds another power supply which mainly comprises a photovoltaic power generation system as supplement under the condition that a user is accessed to a conventional alternating current distribution network to form an alternating current-direct current dual-power supply system of comprehensive energy. A multi-port multi-flow power electronic transformer is used as a core conversion component of an alternating current-direct current dual-power supply system, an ATS power supply change-over switch is used as a core switch device, a corresponding protection control system is configured to realize stable and efficient operation of the system, renewable energy sources such as photovoltaic and the like can be effectively consumed and utilized, and continuity and reliability of power utilization of users are guaranteed.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A comprehensive energy alternating current-direct current dual-power supply system is characterized by comprising a power electronic transformer, a photovoltaic power generation system, a first ATS switch, a second ATS switch, an energy storage system and an AC220V power grid;
the AC220V power grid is connected with a first ATS switch and a second ATS switch, the power electronic transformer is connected with the photovoltaic power generation system, the first ATS switch and the second ATS switch, the first ATS switch is connected with a plurality of alternating current loads, the second ATS switch is connected with a plurality of direct current loads, and the energy storage system is connected between the first ATS switch and the power electronic transformer.
2. The integrated energy source AC-DC dual-power supply system according to claim 1, wherein the AC220V grid is connected to the second ATS switch through an AC/DC converter.
3. The comprehensive energy source AC-DC dual-power supply system according to claim 1, wherein the AC loads are 220V AC loads.
4. The comprehensive energy alternating current-direct current dual-power supply system according to claim 1, wherein the direct current loads are 750V direct current charging piles.
5. The integrated energy source dual power supply system according to claim 1, wherein the power electronic transformer is a three-port power electronic transformer including a photovoltaic input, an AC220V port, and a DC750V port, the photovoltaic system is connected to the photovoltaic input, the first ATS switch is connected to the AC220V port, and the second ATS switch is connected to the DC750V port.
6. The integrated energy source AC/DC dual-power supply system according to claim 1, wherein the AC220V port has energy bidirectional flow function, and the energy storage system is connected with the AC220V port to store electric energy.
7. The comprehensive energy alternating current-direct current dual-power supply system according to claim 1, further comprising a protection control system, wherein the protection control system is connected with the power electronic transformer, the first ATS switch and the second ATS switch, and is used for setting and selecting the main power supply and the standby power supply, and automatically switching the standby power supply to supply power after the main power supply is powered off.
8. The comprehensive energy source AC-DC dual-power supply system according to claim 7, wherein the photovoltaic power generation system is a main power source, and the AC220V power grid is a backup power source.
9. The comprehensive energy source AC-DC dual-power supply system according to claim 7, wherein the AC220V power grid is a main power supply and the photovoltaic power generation system is a backup power supply.
10. The comprehensive energy source AC-DC dual-power supply system according to any one of claims 7-9, wherein the photovoltaic power generation system and the AC220V power grid supply power independently.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010429872.5A CN111509834A (en) | 2020-05-20 | 2020-05-20 | Comprehensive energy alternating current-direct current dual-power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010429872.5A CN111509834A (en) | 2020-05-20 | 2020-05-20 | Comprehensive energy alternating current-direct current dual-power supply system |
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| CN111509834A true CN111509834A (en) | 2020-08-07 |
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| CN202010429872.5A Pending CN111509834A (en) | 2020-05-20 | 2020-05-20 | Comprehensive energy alternating current-direct current dual-power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821404A (en) * | 2021-03-09 | 2021-05-18 | 广东电网有限责任公司 | Power supply system and method based on power electronic transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202197142U (en) * | 2011-08-20 | 2012-04-18 | 福建先行新能源科技有限公司 | Solar photovoltaic power generation and commercial power mutual standby system |
| CN107516893A (en) * | 2017-07-26 | 2017-12-26 | 清华大学 | Energy router and the electricity-generating control method based on the energy router |
| CN207124475U (en) * | 2017-09-13 | 2018-03-20 | 北京天诚同创电气有限公司 | Energy-storage system |
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2020
- 2020-05-20 CN CN202010429872.5A patent/CN111509834A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202197142U (en) * | 2011-08-20 | 2012-04-18 | 福建先行新能源科技有限公司 | Solar photovoltaic power generation and commercial power mutual standby system |
| CN107516893A (en) * | 2017-07-26 | 2017-12-26 | 清华大学 | Energy router and the electricity-generating control method based on the energy router |
| CN207124475U (en) * | 2017-09-13 | 2018-03-20 | 北京天诚同创电气有限公司 | Energy-storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112821404A (en) * | 2021-03-09 | 2021-05-18 | 广东电网有限责任公司 | Power supply system and method based on power electronic transformer |
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Application publication date: 20200807 |