Control device, energy management system, and non-transitory computer readable medium
According to one embodiment, a control device for an electric power system capable of supplying power to load devices in a plurality of demand areas based on first to N-th power devices in first to N-th placement areas and configured to be able to perform at least one of discharge or charge of power, comprising: a controller configured to detect, based on information of power consumption in each of the demand areas, a demand area in which the power consumption fluctuates more significantly than usual, and determine, according to distances between a detected demand area and the first to N-th placement areas, a control parameter related to input and output of power in the first to N-th power devices.
1 . A control device for an electric power system capable of supplying power to load devices in a plurality of demand areas based on first to N-th power devices in first to N-th placement areas, where N is an integer of 3 or more, and configured to be able to perform at least one of discharge or charge of power, the control device comprising:
a controller configured to:
detect, based on information of power consumption in each of the demand areas, a demand area in which the power consumption fluctuates more significantly than usual; and
determine, according to distances between a detected demand area and the first to N-th placement areas, a control parameter related to input and output of power in the first to N-th power devices,
wherein the control parameter is at least one of:
(i) an inertia constant such that the inertia constant of a power device in a placement area closer to the detected demand area is increased,
(ii) a droop rate such that the droop rate of a power device in a placement area closer to the detected demand area is increased,
(iii) a control amount of Frequency Restoration Reserves such that the control amount of a power device in a placement area closer to the detected demand area is increased, or
(iv) a control amount of Replacement Reserve such that the control amount of a power device in a placement area closer to the detected demand area is increased.
2 . The control device according to claim 1 , wherein the controller, in regulating Frequency Restoration Reserves of the first to N-th power devices according to the distances between the detected demand area and the first to N-th areas, increases the control amount as at least one of a generation capacity of a power generation device included in the power device, a state of charge of a power storage device included in the power device, or inertial energy held by the power device becomes larger.
3 . The control device according to claim 1 , wherein the controller, in regulating Replacement Reserve of the first to N-th power devices according to the distances between the detected demand area and the first to N-th placement areas, increases the control amount as at least one of a generation capacity of a power generation device included in the power device, a state of charge of a power storage device included in the power device, or inertial energy held by the power device becomes larger.
4 . The control device according to claim 1 , wherein:
at least one of the first to N-th power devices includes a power generation device, and
the controller changes the control parameter of the power device that includes the power generation device further based on a generation capacity of the power generation device such that as the generation capacity is larger, the control parameter including the at least one of the inertia constant, the droop rate, the control amount of Frequency Restoration Reserves, or the control amount of Replacement Reserve is increased.
5 . The control device according to claim 1 , wherein:
at least one of the first to N-th power devices includes a power storage device, and
the controller changes the control parameter of the power device that includes the power storage device further based on a state of charge of the power storage device such that as the state of charge is larger, the control parameter including the at least one of the inertia constant, the droop rate, the control amount of Frequency Restoration Reserves, or the control amount of Replacement Reserve is increased.
6 . The control device according to claim 5 , wherein:
the at least one power device further includes a power generation device,
the power storage device is configured to store power generated by the power generation device, and
the controller changes the control parameter of the power device based on both a state of charge of the power storage device and a generation capacity of the power generation device, such that as the state of charge or the generation capacity is larger, the control parameter including the at least one of the inertia constant, the droop rate, the control amount of Frequency Restoration Reserves, or the control amount of Replacement Reserve is increased.
7 . The control device according to claim 1 , wherein:
the electric power system is connected to an electrical grid via a switch,
the controller changes the control parameter further based on opened/closed state information indicating whether or not the switch is opened,
in an on-grid state in which the switch is closed, the controller sets the control parameter based on first correspondence information defining a relationship between distances to the detected demand area and values of control parameters including at least one of an inertia constant, a droop rate, a control amount of Frequency Restoration Reserves, or a control amount of Replacement Reserve, and
in an off-grid state in which the switch is opened, the controller sets the control parameter based on second correspondence information in which the values or change widths of the control parameters are reduced as compared with those set based on the first correspondence information.
8 . The control device according to claim 1 , wherein the distances between the detected demand area and the first to N-th placement areas is a distance along a power line in the power system.
9 . The control device according to claim 1 , wherein the distances between the detected demand area and the first to N-th placement areas is a geographical distance.
10 . The control device according to claim 1 , wherein the power consumption in each of the demand areas is a total of power consumption of the load devices in each of the demand areas.
11 . An energy management system for an electric power system capable of supplying power to load devices in a plurality of demand areas based on first to N-th power devices in first to N-th placement areas, where N is an integer of 3 or more, and configured to be able to perform at least one of discharge or charge of power, the system comprising:
a communicator configured to communicate with a plurality of information communication devices corresponding to the plurality of demand areas;
an acquirer configured to acquire information of power consumption in each of the demand areas from the plurality of information communication devices;
a controller configured to:
detect, based on the information of the power consumption in each of the demand areas, a demand area in which the power consumption fluctuates more significantly than usual; and
determine, according to distances between a detected demand area and the first to N-th placement areas, a control parameter related to input and output of power in the first to N-th power devices; and
a control commander configured to transmit command information to the first to N-th power devices to instruct the first to N-th power devices to perform power input/output based on the control parameter,
wherein the control parameter is at least one of:
(i) an inertia constant such that the inertia constant of a power device in a placement area closer to the detected demand area is increased,
(ii) a droop rate such that the droop rate of a power device in a placement area closer to the detected demand area is increased,
(iii) a control amount of Frequency Restoration Reserves such that the control amount of a power device in a placement area closer to the detected demand area is increased, or
(iv) a control amount of Replacement Reserve such that the control amount of a power device in a placement area closer to the detected demand area is increased.
12 . A non-transitory computer readable storage medium having a computer program stored thereon, the program being executable by a computer of an electric power system which is capable of supplying power to load devices in a plurality of demand areas based on first to N-th power devices in first to N-th placement areas, where N is an integer of 3 or more, and which is configured to be able to perform at least one of discharge or charge of power, and the program being executable to control the computer to execute processes comprising:
acquiring information of power consumption in each of the demand areas;
detecting, based on the information of the power consumption in each of the demand areas, a demand area in which the power consumption fluctuates more significantly than usual;
determining, according to distances between a detected demand area and the first to N-th placement areas, a control parameter related to input and output of power in the first to N-th power devices; and
transmitting command information to the first to N-th power devices to instruct the first to N-th power devices to perform power input/output based on the control parameter,
wherein the control parameter is at least one of:
(i) an inertia constant such that the inertia constant of a power device in a placement area closer to the detected demand area is increased,
(ii) a droop rate such that the droop rate of a power device in a placement area closer to the detected demand area is increased,
(iii) a control amount of Frequency Restoration Reserves such that the control amount of a power device in a placement area closer to the detected demand area is increased, or
(iv) a control amount of Replacement Reserve such that the control amount of a power device in a placement area closer to the detected demand area is increased.