Command device, charge-discharge control system, power control system, central command device, setting value management device, charge-discharge control method, and storage medium

A charge-discharge control system to control charging and discharging of a storage battery connected to a power system, the charge-discharge control system comprising:

• communication circuitry to receive a first command value that is periodically commanded at a control period, the first command value being a command value of an externally-commanded charge-discharge amount of the storage battery;
• short-period fluctuation extraction circuitry to extract a short-period fluctuation, which is a fluctuation having a period shorter than the control period, of a measurement value with respect to electrical power at an interconnection point;
• and
• power control circuitry to control charging and discharging of the storage battery based on a third command value, the third command value being a result of addition of the first command value and a second command value, the second command value being generated based on the short-period fluctuation.

A power control system to control a power system, the power control system comprising:

• a charge-discharge control system to control charging and discharging of a storage battery connected to the power system;
• and
• a central command device to generate a first command value to ensure quality of the power system, and to command the charge-discharge control system to use the first command value, the first command value being a command value that is periodically commanded at a control period for charging and discharging of the storage battery, wherein
• the charge-discharge control system includes
• communication circuitry to receive the first command value,
• short-period fluctuation extraction circuitry to extract a short-period fluctuation, which is a fluctuation having a period shorter than the control period, of a measurement value with respect to electrical power at an interconnection point, and
• power control circuitry to control charging and discharging of the storage battery based on a third command value, the third command value being a result of addition of the first command value and a second command value, the second command value being generated based on the short-period fluctuation.

A central command device wherein

• the central command device determines a first command value, that is periodically commanded at a control period, using predicted values of an amount of load and of a power generation quantity in a power system under a limiting condition where an absolute value of an amount of control of charging-discharging of a storage battery connected to the power system is less than or equal to a chargeable amount during charging, and is less than or equal to a dischargeable amount of discharge during discharging, and commands a charge-discharge control system to use the first command value, the first command value being the amount of control to reduce an amount of deviation from a proper voltage range of voltage of the power system, the charge-discharge control system controlling charging and discharging of the storage battery,
• the chargeable amount and the dischargeable amount are determined based on a short-period fluctuation, which is a fluctuation having a period shorter than the control period, of electrical power at an interconnection point of the charge-discharge control system,
• the charge-discharge control system controls charging and discharging of the storage battery based on a third command value, the third command value being a result of addition of the first command value and a second command value, the second command value being generated based on a short-period fluctuation extracted from a measurement value with respect to electrical power at the interconnection point.

A charge-discharge control method for use in a command device that generates a command for a power control device that controls a storage battery connected to a power system, the charge-discharge control method comprising:

• receiving a first command value that is periodically commanded at a control period, the first command value representing an externally-commanded charge-discharge amount with respect to the storage battery;
• extracting a short-period fluctuation, which is a fluctuation having a period shorter than the control period, of a measurement value with respect to electrical power at an interconnection point of the power control device that controls charging and discharging of the storage battery;
• and
• calculating a third command value and commanding the power control device to use the third command value, the third command value being a result of addition of the first command value and a second command value, the second command value being generated based on the short-period fluctuation.

A non-transitory storage medium storing a program for causing a computer system to perform:

• receiving a first command value that is periodically commanded at a control period, the first command value representing an externally-commanded charge-discharge amount with respect to a storage battery connected to a power system;
• extracting a short-period fluctuation, which is a fluctuation having a period shorter than the control period, of a measurement value with respect to electrical power at an interconnection point of a power control device that controls charging and discharging of the storage battery;
• and
• calculating a third command value and commanding the power control device to use the third command value, the third command value being a result of addition of the first command value and a second command value, the second command value being generated based on the short-period fluctuation.