Power grid control system using electric vehicle, power grid control apparatus, information distribution apparatus, and information distribution method

• US 9,153,966 B2
• Filed: 08/24/2010
• Issued: 10/06/2015
• Est. Priority Date: 12/24/2009
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Ishida, Takaharu
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US13/394,264
• Publication Number:
  US 20120249068A1
• Time in Patent Office: 1,869 Days
• Field of Search: 320/104, 320/109, 320/134
• US Class Current: 1/1
• CPC Class Codes: B60L 2260/56 Temperature prediction, e.g. for pre-cooling
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: G07F 15/005 dispensed for the electrical charging of vehicles electrical charging as such, B60L50/00
• CPC Class Codes: G07F 15/008 Rewarding for providing delivery of electricity to the network
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 2300/40 wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
• CPC Class Codes: H02J 3/322 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
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 70/30 : Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

Provided are charging/discharging spots which are connected to a power grid and which charge storage batteries of electric vehicles connected thereto and discharge charged power of the storage batteries to the power grid; a data center which collects and stores current position information of electric vehicles located in a territory and charging state information of storage batteries of the electric vehicles; and a power aggregator which ranks degrees of necessity of charging/discharging the storage batteries of the respective electric vehicles based on the stored position information, the charging state information of the storage batteries and position information of the charging/discharging spots and creates a ranking list indicating the ranks. The power aggregator distributes information for guiding each of the electric vehicles to a designated one of the charging/discharging spots for charging or discharging in accordance with the ranking list. Accordingly, moving electric vehicles can be guided to charging/discharging spots, so that power charged/discharged on the power grid side can be kept more surely.

Claims

1. A power grid control system using electric vehicles, comprising:

charging/discharging spots which are connected to a power grid and which charge storage batteries of electric vehicles connected thereto and discharge charged power of the storage batteries to the power grid;

a data center which collects and stores current position information of electric vehicles located in a territory and charging state information of storage batteries of the electric vehicles; and

a power aggregator which ranks degrees of necessity of charging/discharging the storage batteries of the respective electric vehicles based on the stored position information, the charging state information of the storage batteries and position information of the charging/discharging spots and creates a ranking list indicating the ranks;

wherein

the power aggregator distributes information for guiding each of the electric vehicles to a designated one of the charging/discharging spots for charging or discharging in accordance with the ranking list.

2. A power grid control system using electric vehicles according to claim 1, wherein the ranking list is calculated in accordance with a history of responses when each electric vehicle is guided to a designated one of the charging/discharging spots for charging/discharging.

3. A power grid control system using electric vehicles according to claim 1, wherein the ranking list is calculated based on at least one of the charging state of the storage battery of each electric vehicle, proximity between the electric vehicle and the charging/discharging spot, the frequency of cooperation for guidance with respect to charging/discharging at the charging/discharging spot from the power aggregator, and a level of CO2 emission.

4. A power grid control system using electric vehicles according to claim 1, wherein the power aggregator calculates a charging/discharging power amount from the storage battery of each electric vehicle based on at least one of price suitability indicating coincidence of power purchase and sale prices between the power aggregator and each electric vehicle user, the charging state of the storage battery mounted in each electric vehicle, a physical distance between the charging/discharging spot and the electric vehicle, a temporal distance between the charging/discharging spot and the electric vehicle, and a level of CO2 emission.

5. A power grid control system using electric vehicles according to claim 1, wherein the data center has a power analysis coloring device which analyzes a power flow of each power substation near to each electric vehicle and calculates a ratio of power flows derived from various energy sources including fossil fuel, recyclable energy and nuclear power occupied in the power flow, and the power aggregator performs calculation for guiding each electric vehicle to the charging/discharging spot based on the calculated ratio of the power flows derived from the various energy sources.

6. A power grid control system using electric vehicles according to claim 1, wherein the power aggregator displays a designated charging/discharging spot name, distance to the charging spot or arrival time, and price incentive information on a navigation screen of each electric vehicle in real time when information for guiding the electric vehicle to the designated charging/discharging spot for charging or discharging is distributed.

7. A power grid control apparatus using electric vehicles, comprising:

charging/discharging spots which are connected to a power grid and which charge storage batteries of electric vehicles connected thereto and discharge charged power of the storage batteries to the power grid;

a data center which collects and stores current position information of electric vehicles located in a territory and charging state information of storage batteries of the electric vehicles; and

a power aggregator which ranks degrees of necessity of charging/discharging the storage batteries of the respective electric vehicles based on the stored position information, the charging state information of the storage batteries and position information of the charging/discharging spots, creates a ranking list indicating the ranks, and distributes information for guiding each of the electric vehicles to a designated one of the charging/discharging spots for charging/discharging in accordance with the ranking list.