ELECTRIC-POWER MANAGEMENT SYSTEM, ELECTRIC-POWER MANAGEMENT METHOD, AND SECTION CONTROLLER

• US 20130110304A1
• Filed: 03/16/2011
• Published: 05/02/2013
• Est. Priority Date: 04/12/2010
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Hirasawa, Shigeki, Wachi, Isao, Shiga, Yasuko, Watanabe, Tohru
• Granted Patent: US 9,395,741 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2260/54 Energy consumption estimation
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/50 Charging stations characterised by energy-storage or power-generation means
• CPC Class Codes: B60L 53/53 Batteries
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• 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: G05F 5/00 Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
• CPC Class Codes: H02J 13/00004 characterised by the power network being locally controlled
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2310/10 The network having a local or delimited stationary reach
• 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 3/144 Demand-response operation of the power transmission or distribution network
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• 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 10/72 : Electric energy management in electromobility
• 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

Abstract

Electric-power management system, an area controller transmits, to each of section controllers, information about a target voltage and information about the present voltage, each of the section controllers calculating a difference between the target voltage and the present voltage, received from the area controller, and calculating a power'"'"'s demand-supply-adjustment request amount based on difference between the information about the voltages, each of facility-equipment controllers transmitting power-reception/power-release capable equipment information to each section controller, being information about a power-reception/power-release capable equipment in a facility into which the facility-equipment controller is installed, the section controller, based on the power-reception/power-release capable equipment information about the equipment, transmitting the equipment'"'"'s demand-supply-adjustment request amount and the facility-equipment controller transmitting a control signal to the equipment based on the equipment'"'"'s demand-supply-adjustment request amount received from the section controller to the facility-equipment controller in the facility.

Claims

1-19. -19. (canceled)

20. An electric-power management system, comprising:

each of facility-equipment controllers installed into facilities on each facility basis, and managing a single equipment or a plurality of equipments in each of said facilities;

each of section controllers for controlling each of said facility-equipment controllers; and

an area controller for controlling each of said section controllers, wherein

said area controller comprises a communications unit for transmitting information to each of said section controllers, said information indicating a target value about electric power and a current-state value about said electric power,

each of said section controllers, comprising;

a reception unit for receiving power-reception/power-release capable equipment information from each of said facility-equipment controllers as information about a power amount whose power-reception/power-release is capable of being performed by a facility into which said facility-equipment controller is installed;

a demand-supply-adjustment-request amount calculation unit for calculating a difference value between said target value and said current-state value, and, based on said difference value, calculating a demand-supply-adjustment request amount for said electric power; and

a transmission unit for transmitting, based on said power-reception/power-release capable equipment information, said demand-supply-adjustment request amount to said facility-equipment controller, said power-reception/power-release capable equipment information having been transmitted from said facility-equipment controller, said power-reception/power-release of said demand-supply-adjustment request amount being capable of being performed in said facility into which said facility-equipment controller is provided,

said facility-equipment controller, based on said demand-supply-adjustment request amount, transmitting a control signal to said single equipment or said plurality of equipments, said demand-supply-adjustment request amount being received from said section controller.

22. The electric-power management system according to claim 20, wherein

said current-state value is a current-state voltage value, said target value being a target voltage value,

said section controller transmitting a power-consumption amount to said facility-equipment controller as said demand-supply-adjustment request amount, if said current-state voltage value is higher than said target voltage value,

said section controller transmitting a power-release amount to said facility-equipment controller as said demand-supply-adjustment request amount, if said current-state voltage value is lower than said target voltage value.

23. The electric-power management system according to claim 20, wherein

said power-reception/power-release capable equipment information includes said information indicating said power-reception/power-release capable equipments, and information indicating a power-consumption amount or a power-release amount whose power-reception/power-release is capable of being performed by said equipments.

24. The electric-power management system according to claim 20, wherein

said section controller, based on said power-reception/power-release capable equipment information, calculating an operation order of said equipments,

said section controller then, based on said operation order, transmitting said demand-supply-adjustment request amount for said equipments to said facility-equipment controller.

25. The electric-power management system according to claim 24, wherein

said operation order of said equipments is determined in a manner of being distributed into said plurality of facilities.

26. The electric-power management system according to claim 20, wherein

said current-state value is a current-state voltage value, said target value being a target voltage value.

27. The electric-power management system according to claim 20, wherein

said section controller calculates said demand-supply-adjustment request amount,

said section controller then dividing and allocating said demand-supply-adjustment request amount for said equipments to said power-reception/power-release capable equipments.

28. The electric-power management system according to claim 20, wherein

said current-state value is a current-state voltage value, said target value being a target voltage value,

said area controller setting said target voltage value of said section controller and that of another section controller at lower values, if value of information about said electric power of said section controller falls above a predetermined reference value,

said area controller setting said target voltage value of said section controller and that of another section controller at higher values, if said value of said information about said electric power of said section controller falls below said predetermined reference value.

40. The electric-power management system according to claim 20, wherein

each of said facility-equipment controllers is integrated into said single equipment or said plurality of equipments.

21. An electric-power management system, comprising:

each of section controllers for controlling electric power in a plurality of facilities;

an area controller for controlling each of said section controllers; and

each of facility-equipment controllers installed into said facilities on each facility basis, and managing a single equipment or a plurality of equipments in each of said facilities, wherein

said area controller transmits information to each of said section controllers, said information indicating a target value about said electric power and a current-state value about said electric power,

each of said section controllers calculating a difference value between said target value and said current-state value, and, based on said difference value, calculating a demand-supply-adjustment request amount for said electric power,

each of said facility-equipment controllers transmitting power-reception/power-release capable equipment information to each section controller, said power-reception/power-release capable equipment information being information about power-reception/power-release capable equipments in a facility into which said facility-equipment controller is installed,

said section controller, based on said power-reception/power-release capable equipment information, transmitting said demand-supply-adjustment request amount for said power-reception/power-release capable equipments to said facility-equipment controller in said facility into which said power-reception/power-release capable equipments are installed, and

said facility-equipment controller, based on said demand-supply-adjustment request amount for said equipments, transmitting a control signal to said single equipment or said plurality of equipments, said demand-supply-adjustment request amount being received by said facility-equipment controller from said section controller.

29. An electric-power management method in an electric-power management system,

said electric-power management system, comprising:

each of section controllers for controlling electric power in a plurality of facilities;

an area controller for controlling each of said section controllers; and

each of facility-equipment controllers installed into said facilities on each facility basis, and managing a single equipment or a plurality of equipments in each of said facilities,

said electric-power management method, comprising the steps of;

said area controller'"'"'s transmitting a target value about said electric power to each of said section controllers;

each of said section controllers'"'"' calculating a difference value between a current-state value about said electric power and said target value received from said area controller, and, based on said difference value, calculating a demand-supply-adjustment request amount for said electric power;

each of said facility-equipment controllers'"'"' transmitting power-reception/power-release capable equipment information to each section controller, said power-reception/power-release capable equipment information being information about power-reception/power-release capable equipments in a facility into which said facility-equipment controller is installed;

said section controller'"'"'s, based on said power-reception/power-release capable equipment information about said equipments, transmitting said demand-supply-adjustment request amount for said equipments to said facility-equipment controller in said facility into which said equipments are installed; and

said facility-equipment controller'"'"'s, based on said demand-supply-adjustment request amount, transmitting a control signal to said single equipment or said plurality of equipments, said demand-supply-adjustment request amount being received by said facility-equipment controller from said section controller.

30. The electric-power management method according to claim 29, wherein

said current-state value is a current-state voltage value, said target value being a target voltage value,

said electric-power management method, further comprising the steps of:

said section controller'"'"'s transmitting a power-consumption amount to said facility-equipment controller, if said current-state voltage value is higher than said target voltage value, said power-consumption amount being said demand-supply-adjustment request amount; and

said section controller'"'"'s transmitting a power-release amount to said facility-equipment controller, if said current-state voltage value is lower than said target voltage value, said power-release amount being said demand-supply-adjustment request amount.

31. The electric-power management method according to claim 29, wherein

said power-reception/power-release capable equipment information includes said information about said power-reception/power-release capable equipments, and information about a power-consumption amount or a power-release amount whose power-reception/power-release is capable of being performed by said equipments.

32. The electric-power management method according to claim 29, further comprising a step of:

an acceptance-processing transmission unit of said section controller'"'"'s, based on said power-reception/power-release capable equipment information, calculating an operation order of said equipments, and, based on said operation order, transmitting operation requests for operating said equipments to said facility-equipment controller.

33. The electric-power management method according to claim 31, wherein

said operation order of said equipments is determined in a manner of being distributed into said plurality of facilities.

34. The electric-power management method according claim 29, wherein

said section controller calculates said demand-supply-adjustment request amount,

said section controller then dividing and allocating said demand-supply-adjustment request amount for said equipments to said power-reception/power-release capable equipments.

35. A section controller for controlling electric power in a plurality of facilities,

said section controller, comprising:

a demand-supply-adjustment-request amount calculation unit for calculating a difference value between a current-state value about said electric power and a target value about said electric power, and, based on said difference value, calculating a demand-supply-adjustment request amount for said electric power, said target value being received from an area controller for controlling said section controller; and

an acceptance-processing transmission unit for receiving power-reception/power-release capable equipment information from each of facility-equipment controllers, said power-reception/power-release capable equipment information being information about power-reception/power-release capable equipments in a facility into which said facility-equipment controller is installed, and, based on said power-reception/power-release capable equipment information, transmitting, to said facility-equipment controller, said demand-supply-adjustment request amount set for said equipments of said facility equipment.

36. An electric-power management system for controlling electric power and an electric-power system,

said electric-power management system, comprising:

an area controller having electric-power information about a high-voltage power-distributing line and information about openers/closers;

each of section controllers having intra-section electric-power information about a low-voltage power-distributing line which is branched from said high-voltage power-distributing line;

each of facility-equipment controllers having information about facility equipment which performs power-reception or power-release of electric power; and

said facility equipment, wherein

said electric-power management system further comprises means for instructing, as target voltage, an accident-time reference value to said section controller of a section when said area controller has detected an accident on said high-voltage power-distributing line, said section existing within an influential range of said accident.

37. An electric-power management system for controlling electric power and an electric-power system,

said electric-power management system, comprising:

an area controller having electric-power information about a high-voltage power-distributing line and information about openers/closers;

each of section controllers having intra-section electric-power information about a low-voltage power-distributing line which is branched from said high-voltage power-distributing line;

each of facility-equipment controllers having information about facility equipment which performs power-reception or power-release of electric power; and

said facility equipment, wherein

said section controller comprises means for specifying target voltage for said low-voltage power-distributing line as being an accident-time reference value, when said section controller has detected accident information from said facility-equipment controller of a facility which receives supply of said electric power from said low-voltage power-distributing line.

38. The electric-power management system according to claim 37, wherein

said section controller further comprises

at least one means of means for comparing with each other plural pieces of information from plural units of said facility equipment which receive said supply of said electric power from said one and same low-voltage power-distributing line, when said section controller has detected said accident information from said facility-equipment controller of said facility which receives said supply of said electric power from said low-voltage power-distributing line, and means for acquiring and comparing with each other plural pieces of accident information from said area controller and said openers/closers;

and

means for modifying said target voltage for said low-voltage power-distributing line to a normal reference value or said accident-time reference value, after judging the true or false of occurrence of said accident on said low-voltage power-distributing line by comparing said plural pieces of accident information with each other.

39. The electric-power management system according to claim 38, wherein

said section controller comprises

means for instructing said facility-equipment controller or said facility equipment to stop said power-release of said electric power into said low-voltage power-distributing line, when said target voltage value becomes said accident-time reference value;

and

means for instructing said facility-equipment controller or said facility equipment to restart said power-release of said electric power into said low-voltage power-distributing line, when said target voltage value is recovered to a normal reference value.