CONTROL SYSTEM FOR ELECTRIC VEHICLE CHARGING STATION AND METHOD THEREOF

• US 20160167539A1
• Filed: 10/31/2014
• Published: 06/16/2016
• Est. Priority Date: 10/31/2014
• Status: Active Grant

• Current Assignee: ABB Technology AG (ABB Limited)
• Original Assignee: ABB Technology Limited (ABB Ltd.)
• Inventors: HUANG, XING, YU, RONGRONG, ZELAYA DE LA PARRA, HECTOR, CHEN, YAO
• Granted Patent: US 10,137,796 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/63 in response to network capacity
• 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: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H02J 13/00022 using wireless data transmission
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• 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 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 20/222 : Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 40/126 : using wireless data transmission

Abstract

A control system for an electric vehicle charging station (EVCS) is provided, the control system comprises: a central controller configured to receive an ancillary service order from a power grid and distribute the ancillary service order to one or more local controllers periodically; and the one or more local controllers configured to control a plurality of electric vehicle supply devices based on the distributed ancillary service order in real time. The method controlling the electric vehicle charging station (EVCS) is also provided.

Claims

1. A control system for an electric vehicle charging station (EVCS), comprising:

a central controller configured to receive an ancillary service order from a power grid and distribute the ancillary service order to one or more local controllers periodically;

the one or more local controllers configured to control a plurality of electric vehicle supply devices based on the distributed ancillary service order in real time; and

wherein the central controller is further configured to divide an ancillary service period into an ancillar service providing time and a battery charging time for each electric vehicle supply device.

2. The control system according to claim 1, wherein the central controller is further configured to evaluate a required energy of batteries in each electric vehicle for charging and an available capacity for ancillary service.

3. The control system according to claim 2, wherein the central controller is further configured to distribute the ancillary service order to the plurality of electric vehicle supply devices according to a required energy of batteries in each electric vehicle for charging and the evaluated available capacity value for ancillary service.

4. The control system according to claim 2, wherein the available capacity for ancillary service comprises an available energy of the batteries in each electric vehicle and an available power of each electric vehicle supply device.

6. The control system according to claim 1, wherein the ancillary service period is flexibly configured.

7. The control system according to claim 1, wherein a sequence of the ancillary service providing time and the battery charging time in each ancillary service period is flexibly configured.

8. The control system according to claim 7, wherein the battery charging time is at end of the ancillary service period, or at beginning of the ancillary service period, or at arbitrary part of the ancillary service period.

9. The control system according to claim 1, wherein the central controller is further configured to prepare for ancillary service by regulating energy in the batteries of the electric vehicles during intervals when the ancillary service order is zero in the ancillary service providing time.

10. The control system according to claim 1, wherein the central controller is further configured to set a fixed time used for battery charging in every ancillary service period.

11. The control system according to claim 10, wherein the fixed time is a function of a final energy requirement by customers, a state of charge (SOC) of battery, a maximum power capacity of the electric vehicle supply device, and mathematical statistics of time length for the ancillary service in one ancillary service period.

12. The control system according to claim 1, wherein the central controller is configured to operate the electric vehicle supply devices at a de-rating operation mode by considering a battery capacity based on an operation condition and a battery type.

13. The control system according to claim 12, wherein the operation condition comprises temperature and a life time of battery.

14. The control system according to claim 1, wherein the central controller is configured to use a closed loop control of active and reactive power with an energy storage system (ESS) to improve power supply quality which is affected by power fluctuations at a point of common coupling (PCC).

15. The control system according to claim 1, wherein the central controller is located in a substation, or located in a master electric vehicle supply device of the plurality of electric vehicle supply devices, or located in a control room or on a control platform.

16. The control system according to claim 1, wherein the one or more local controllers take demands of customers as inputs, and wherein the demands of customers comprise at least one of:

a willingness to participate in ancillary service, an expected time to stay in the EVCS, and a desired value of energy storage in batteries of the electric vehicles when customers leave.

17. The control system according to claim 1, wherein the central controller is configured to communicate with the one or more local controllers with different communication protocols.

18. The control system according to claim 1, wherein the electric vehicle supply devices comprise unidirectional electric vehicle supply devices and bidirectional electric vehicle supply devices.

5. (canceled)

19. A method for controlling an electric vehicle charging station (EVCS), comprising:

receiving an ancillary service order from a power grid;

distributing the ancillary service order to one or more lower level controllers periodically;

controlling a plurality of electric vehicle supply devices based on the distributed ancillary service order in real time; and

dividing an ancillary service period into ancillary service providing time and battery charging time for each electric vehicle supply device.

20. The method according to claim 19, further comprising evaluating a required energy of batteries in each electric vehicle for charging and an available capacity value for ancillary service.

21. The method according to claim 20, wherein distributing the ancillary service order to the one or more lower level controllers periodically further comprises distributing the ancillary service order to a plurality of electric vehicle supply devices according to a required energy of batteries in each electric vehicle for charging and the evaluated available capacity value for ancillary service.

22. The method according to claim 20, wherein the available capacity for ancillary service comprises an available energy of the batteries in each electric vehicle and an available power of each electric vehicle supply device.

24. The method according to claim 19, wherein the ancillary service period is flexibly configured.

25. The method according to claim 19, wherein a sequence of the ancillary service providing time and the battery charging time in each ancillary service period is flexibly configured.

26. The method according to claim 25, wherein the battery charging time is at an end of the ancillary service period, or at a beginning of the ancillary service period, or at arbitrary part of the ancillary service period.

27. The method according to claim 19, further comprising:

preparing for ancillary service by regulating energy in batteries of the electric vehicles during intervals when the ancillary service order is zero in the ancillary service providing time.

28. The method according to claim 19, further comprising:

setting a fixed time used for battery charging in every ancillary service period.

29. The method according to claim 28, wherein the fixed time is a function of a final energy requirement by customers, a state of charge (SOC) of battery, a maximum power capacity of the electric vehicle supply device, and mathematical statistics of time length for the ancillary service in one ancillary service period.

30. The method according to claim 19, further comprising:

operating the electric vehicle supply devices at a de-rating operation mode by considering a battery capacity based on an operation condition and a battery type.

31. The method according to claim 30, wherein the operation condition comprises temperature and a life time of battery.

32. The method according to claim 19, further comprising:

using a closed loop control with an energy storage system (ESS) to improve power supply quality which is affected by power fluctuations at a point of common coupling (PCC).

33. The method according to claim 19, further comprising:

taking demands of customers as inputs, wherein the demands of customers comprise at least one of;

a willingness to participate in ancillary service, an expected time to stay in the EVCS, and a desired value of energy storage in batteries of the electric vehicles when customers leave.

34. The method according to claim 19, further comprising:

controlling the plurality of electric vehicle supply devices with different communication protocols.

35. The method according to claim 19, wherein the electric vehicle supply devices comprise unidirectional electric vehicle supply devices and bidirectional electric vehicle supply devices.

23. (canceled)