Power system, control device, and power system control method
When EVSE is unable to acquire DR command based on DR transmitted from the servers from HEMS, for example, when communication between HEMS and EVSE is interrupted, and when the battery of the vehicle is discharging (in reverse power flow), the discharge of the battery is stopped and the battery is charged.
1 . A power system comprising:
a vehicle provided with a power storage device;
a power supply device that performs transmission and reception of power between a power grid and the vehicle;
a gateway device that acquires demand response (DR) information transmitted from a server;
a first communication device that performs communication between the power supply device and the gateway device;
a second communication device that performs communication between the vehicle and the power supply device; and
a control device, wherein
when the power supply device is not able to acquire a command based on the DR information while a reverse power flow from the vehicle is being performed via the power supply device, the control device stops discharging from the power storage device and stops the reverse power flow,
the control device executes control of charging the power storage device from the power grid via the power supply device together with stopping the reverse power flow,
when communication by the second communication device is abnormal while charging of the power storage device is being executed, the control device stops transmission and reception of power by the power supply device, and
DR commands from the gateway device to the power supply device are transmitted and executed in frame units.
2 . The power system according to claim 1 , wherein each of the frame units corresponds to a predetermined time interval, and the power supply device expects a new DR command at each of the frame units.
3 . A control device that controls a power supply device that performs transmission and reception of power between a power grid and a vehicle that includes a power storage device, the control device comprising:
a communication interruption detection unit that detects that the power supply device is not able to acquire a command based on demand response (DR) information from a gateway device that acquires the DR information from a server;
a processing unit that stops discharging from the power storage device and stops a reverse power flow when the communication interruption detection unit detects that the DR information is not able to be acquired while the reverse power flow from the vehicle is being performed via the power supply device; and
a communication abnormality detection unit that detects an abnormality in communication between the vehicle and the power supply device, wherein
the processing unit executes processing of charging the power storage device from the power grid via the power supply device together with stopping the reverse power flow,
when the communication abnormality detection unit detects an abnormality in communication between the vehicle and the power supply device while charging of the power storage device is being executed, the processing unit stops transmission and reception of power by the power supply device, and
DR commands from the gateway device to the power supply device are transmitted and executed in frame units.
4 . A control method of a power system including a vehicle equipped with a power storage device, a power supply device that performs transmission and reception of power between a power grid and the vehicle, a gateway device that acquires demand response (DR) information transmitted from a server, and a communication device that performs communication between the power supply device and the gateway device, the control method comprising:
detecting that the power supply device is not able to acquire the DR information when a reverse power flow is being performed from the vehicle via the power supply device;
stopping discharging from the power storage device and stopping the reverse power flow when the power supply device detects that the DR information is not able to be acquired;
executing charging of the power storage device from the power grid via the power supply device together with stopping the reverse power flow; and
when communication between the vehicle and the power supply device is abnormal while charging of the power storage device is being executed, stopping transmission and reception of power by the power supply device,
wherein DR commands from the gateway device to the power supply device are transmitted and executed in frame units.