SE1600262A1 - Energy transfer in a power microgrid - Google Patents
Energy transfer in a power microgrid Download PDFInfo
- Publication number
- SE1600262A1 SE1600262A1 SE1600262A SE1600262A SE1600262A1 SE 1600262 A1 SE1600262 A1 SE 1600262A1 SE 1600262 A SE1600262 A SE 1600262A SE 1600262 A SE1600262 A SE 1600262A SE 1600262 A1 SE1600262 A1 SE 1600262A1
- Authority
- SE
- Sweden
- Prior art keywords
- energy storage
- mobile energy
- point
- microgrid
- energy
- Prior art date
Links
Classifications
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- 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
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Abstract
Description
15 20 25 30 control and power flow control. While ñxed loads demand fixed power unless the loads are controllable, the power flow in the microgrid is also driven by the location and power production of the DGs. The power imbalance within a microgrid or power limit bottle neck within the microgrid may be handled, to some extent, with a power generation/ consumption which can be shifted physically and in time. In other words, e.g. an energy storage which can be connected to different parts of the microgrid, or of two different microgrids, consuming (storing) power in one part and injecting power in another part. 15 20 25 30 control and power fl ow control. While ñxed loads demand fi xed power unless the loads are controllable, the power fl ow in the microgrid is also driven by the location and power production of the DGs. The power imbalance within a microgrid or power limit bottle neck within the microgrid may be handled, to some extent, with a power generation / consumption which can be shifted physically and in time. In other words, e.g. an energy storage which can be connected to different parts of the microgrid, or of two different microgrids, consuming (storing) power in one part and injecting power in another part.
A mobile energy storage, e.g. an electric vehicle, may be used for the purpose in accordance with the present invention.A mobile energy storage, e.g. an electric vehicle, may be used for the purpose in accordance with the present invention.
The transfer of electrical energy from one location to another in a microgrid may be done directly through an electric vehicle or with two (or more) electric vehicles. Herein is also discussed a method including transferring energy between two electric vehicles.The transfer of electrical energy from one location to another in a microgrid may be done directly through an electric vehicle or with two (or more) electric vehicles. Herein is also discussed a method including transferring energy between two electric vehicles.
In a nested microgrid scenario, a method of energy transfer may also offer power transfer between two microgrids when the two microgrids are not connected electrically to each other or connected through an already overloaded feeder connection.In a nested microgrid scenario, a method of energy transfer may also offer power transfer between two microgrids when the two microgrids are not connected electrically to each other or connected through an already overloaded feeder connection.
According to an aspect of the present invention, there is provided a method of energy transfer from a ñrst point in a microgrid to a second point in the same or another microgrid. The method comprises connecting a mobile energy storage to the first point, charging the mobile energy storage from the first point, moving the mobile energy storage towards the second point, and discharging the mobile energy storage.According to an aspect of the present invention, there is provided a method of energy transfer from a first point in a microgrid to a second point in the same or another microgrid. The method comprises connecting a mobile energy storage to the point rst point, charging the mobile energy storage from the fi rst point, moving the mobile energy storage towards the second point, and discharging the mobile energy storage.
It is to be noted that any feature of any of the aspects may be applied to any other aspect, wherever appropriate. Likewise, any advantage of any of the aspects may apply to any of the other aspects. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following detailed disclosure, from the attached dependent claims as well as from the drawings. 10 15 20 25 Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/ an/ the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one ínstance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated. The use of “first”, “second” etc. for different features/ components of the present disclosure are only intended to distinguish the features/ components from other similar features/ components and not to impart any order or hierarchy to the features/ components.It is to be noted that any feature of any of the aspects may be applied to any other aspect, wherever appropriate. Likewise, any advantage of any of the aspects may apply to any of the other aspects. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following detailed disclosure, from the attached dependent claims as well as from the drawings. 10 15 20 25 Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical fi eld, unless explicitly de fi ned otherwise herein. All references to "a / an / the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated. The use of “fi rst”, “second” etc. for different features / components of the present disclosure are only intended to distinguish the features / components from other similar features / components and not to impart any order or hierarchy to the features / components.
BRIEF DESCRIPTION OF THE DRAWINGS Embodiments will be described, by way of example, with reference to the accompanying drawings, in which: Fig 1 is a schematic block diagram of an embodiment of a microgrid in accordance with the present invention.BRIEF DESCRIPTION OF THE DRAWINGS Embodiments will be described, by way of example, with reference to the accompanying drawings, in which: Fig 1 is a schematic block diagram of an embodiment of a microgrid in accordance with the present invention.
Fig 2 is a schematic functional block diagram illustrating embodiments of interaction between a central grid controller and individual controllers of mobile energy storages such as electrical vehicles.Fig. 2 is a schematic functional block diagram illustrating embodiments of interaction between a central grid controller and individual controllers of mobile energy storages such as electrical vehicles.
Fig 3 is a schematic flow chart of an example embodiment of a control method for a mobile energy storage such as an electrical vehicle.Fig. 3 is a schematic diagram of an example embodiment of a control method for a mobile energy storage such as an electrical vehicle.
Fig 4 is a schematic functional block diagram of an embodiment of a mobile energy storage such as an electrical vehicle.Fig. 4 is a schematic functional block diagram of an embodiment of a mobile energy storage such as an electrical vehicle.
DETAILED DESCRIPTION Embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments are shown.DETAILED DESCRIPTION Embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments are shown.
However, other embodiments in many different forms are possible within the scope of the present disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and 10 15 20 25 complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout the description.However, other embodiments in many different forms are possible within the scope of the present disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and 10 15 20 25 complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout the description.
A high-level overview of embodiments of the present invention are illustrated in figure 1, where energy transfer requirement is identified by the grid controller and energy is transferred my means of one or several mobile energy storages, here electric vehicle(s) (EV), directly from one charging station to another station. The working principal involves 1. Energy transfer need identified by the grid controller 2. Broadcasting the energy transfer need to available EVs. 3. One or more EV participates in the energy transfer from feeder 1 to feeder 3.A high-level overview of embodiments of the present invention are illustrated in ure gure 1, where energy transfer requirement is identi fi ed by the grid controller and energy is transferred my means of one or several mobile energy storages, here electric vehicle (s) (EV) , directly from one charging station to another station. The working principal involves 1. Energy transfer need identified by the grid controller 2. Broadcasting the energy transfer need to available EVs. 3. One or more EV participates in the energy transfer from feeder 1 to feeder 3.
The energy transfer within a microgrid or between microgrids (herein also jointly called electrical network or network/ grid) in nested microgrids (electrically connected or islanded) may by means of embodiments of the present invention be achieved by means of mobile energy storage(s) (herein exemplified as electrical vehicles, EV) where - The energy transfer requirement is identified by the microgrid controller.The energy transfer within a microgrid or between microgrids (herein also jointly called electrical network or network / grid) in nested microgrids (electrically connected or islanded) may by means of embodiments of the present invention be achieved by means of mobile energy storage (s) (herein exemplified as electrical vehicles, EV) where - The energy transfer requirement is identified by the microgrid controller.
- The energy transfer is achieved from one location to other location in the electrical network (microgrid or microgrids) by means of at least one EV.- The energy transfer is achieved from one location to another location in the electrical network (microgrid or microgrids) by means of at least one EV.
- Alternatively, the energy transfer may be achieved from one location to another location of the electrical network with at least two EV involving energy transfer from a first EV to a second EV.Alternatively, the energy transfer may be achieved from one location to another location of the electrical network with at least two EVs involving energy transfer from a first EV to a second EV.
- The energy transfer between the first and second EV may be necessitated by the fact that some parts of the distance between the locations lacks electrical energy supply or has an electrical supply with limited capacity. 10 15 20 25 Energy transfer between EV:s: - The transfer of electrical energy between the first and second EV may be achieved for example by means of an energy storage and controllable power electronic links.- The energy transfer between the fi rst and second EV may be necessitated by the fact that some parts of the distance between the locations lacks electrical energy supply or has an electrical supply with limited capacity. 10 15 20 25 Energy transfer between EV: s: - The transfer of electrical energy between the fi rst and second EV may be achieved for example by means of an energy storage and controllable power electronic links.
- The control method may be done in a centralized way or a decentralized way e. g. by handshaking of the two EV depending on the state of charge and energy exchange requirements.- The control method may be done in a centralized way or a decentralized way e.g. by handshaking of the two EV depending on the state of charge and energy exchange requirements.
- The “join and leave' of two EV for transfer of energy between them may be implemented at certain part of path or anywhere during travel.- The 'join and leave' of two EVs for transfer of energy between them may be implemented at certain part of path or anywhere during travel.
- The energy transfer may be made with electrically conductive and/ or inductive means of energy transfer.- The energy transfer may be made with electrically conductive and / or inductive means of energy transfer.
EV system: - Each EV may have the ability to join securely to the other EV mechanically as well as electrically within a certain timespan to achieve the energy transfer.EV system: - Each EV may have the ability to join securely to the other EV mechanically as well as electrically within a certain timespan to achieve the energy transfer.
- Each EV may have its own electrical system for autonomous operations, local control system to coordinate with a central controller and/ or mechanical system to operate in 'join and leave' with other EV.- Each EV may have its own electrical system for autonomous operations, local control system to coordinate with a central controller and / or mechanical system to operate in 'join and leave' with other EV.
- Each EV may have communication and IT system to exchange information with a central control.- Each EV may have communication and IT system to exchange information with a central control.
- Each EV may have a local controller for optimizing the energy balance between the at least two EV in case of lost connection to a central controller.- Each EV may have a local controller for optimizing the energy balance between the at least two EV in case of lost connection to a central controller.
The logics may be such that it shall make sure that an EV can reach a fixed, known charging location to the largest possible extent.The logics may be such that it shall make sure that an EV can reach a fi xed, known charging location to the largest possible extent.
System Control: 10 15 20 25 - System control may be achieved through local control of each individual EV combined with a centralized control for the microgrid/ network energy management.System Control: 10 15 20 25 - System control may be achieved through local control of each individual EV combined with a centralized control for the microgrid / network energy management.
Benefits with embodiments of the present invention may include any of: 1. A microgrid solution with EV integration where energy transfer is not limited at the charging stations. 2. A microgrid solutions where loads may be moving to offer a new way of energy transfer, overcoming the grid power limits, electrical connection etc. 3. More flexible operation and energy management during nested microgrids scenarios. It is possible to transfer energy between the different nested microgrids without electrical connection there between or with a connection which is already at capacity or overloaded. 4. It may also be possible to handle variation in payload weight and handling of regenerative braking etc. For instance, if two EV are leaving and one has a lot of payload in the separated track, that EV may then receive energy from the other EV. The same may also apply for hilly tracks where an EV performs a significant amount of regenerative breaking and can make sure it is able to collect all that energy by transfer to other EV with less State of Charge (SoC) of its battery. In practice, the central controller may always optimize the SoC of several connected EV such that they all can reach their destination or a charging point with sufficient capacity.Benefits with embodiments of the present invention may include any of: 1. A microgrid solution with EV integration where energy transfer is not limited at the charging stations. 2. A microgrid solutions where loads may be moving to offer a new way of energy transfer, overcoming the grid power limits, electrical connection etc. 3. More fl exible operation and energy management during nested microgrids scenarios. It is possible to transfer energy between the different nested microgrids without electrical connection there between or with a connection which is already at capacity or overloaded. 4. It may also be possible to handle variation in payload weight and handling of regenerative braking etc. For instance, if two EV are leaving and one has a lot of payload in the separated track, that EV may then receive energy from the other EV . The same may also apply for hilly tracks where an EV performs a significant amount of regenerative breaking and can make sure it is able to collect all that energy by transfer to other EV with less State of Charge (SoC) of its battery. In practice, the central controller may always optimize the SoC of several connected EVs so that they can all reach their destination or a charging point with suf fi cient capacity.
An example of a centralized control scheme and a control flowchart for embodiments of the present invention are shown in figure 2 and figure 3, respectively. One example of the necessary infrastructure for an EV to exchange energy is shown in figure 4. It is noted that this is just an example scenario and the invention may be implemented in different ways.An example of a centralized control scheme and a control ch owchart for embodiments of the present invention are shown in ure gure 2 and fi gure 3, respectively. One example of the necessary infrastructure for an EV to exchange energy is shown in Figure 4. It is noted that this is just an example scenario and the invention may be implemented in different ways.
The present disclosure has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the present disclosure, as defined by the appended claims.The present disclosure has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the present disclosure, as de fi ned by the appended claims.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1600262A SE1600262A1 (en) | 2016-09-16 | 2016-09-16 | Energy transfer in a power microgrid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1600262A SE1600262A1 (en) | 2016-09-16 | 2016-09-16 | Energy transfer in a power microgrid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE1600262A1 true SE1600262A1 (en) | 2016-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1600262A SE1600262A1 (en) | 2016-09-16 | 2016-09-16 | Energy transfer in a power microgrid |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE1600262A1 (en) |
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2016
- 2016-09-16 SE SE1600262A patent/SE1600262A1/en not_active Application Discontinuation
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