STORAGE BATTERY CONTROL DEVICE, STORAGE BATTERY CONTROL METHOD, AND STORAGE BATTERY CONTROL SYSTEM
First Claim
1. A storage battery control device for controlling charge and discharge of a storage battery to regulate power system frequency of an electric power system, the storage battery control device comprising:
- a frequency obtainer that obtains the power system frequency;
a charge level meter that measures a charge level of the storage battery;
a setter that sets a charging rate or a discharging rate according to the obtained power system frequency, the charging rate being a rate at which the storage battery is charged to approximate the power system frequency to rated frequency, the discharging rate being a rate at which the storage battery is discharged to approximate the power system frequency to the rated frequency;
an adjuster that adjusts the charging rate or the discharging rate set by the setter, according to the obtained power system frequency and the measured charge level; and
a charge and discharge controller that controls charge and discharge of the storage battery based on the adjusted charging rate or the adjusted discharging rate,wherein the adjuster;
when (i) the measured charge level is lower than a lower limit of a normal range and (ii) the obtained power system frequency is within a first non-sensitive zone ranging from a first frequency lower than the rated frequency to the rated frequency, adjusts the charging rate set by the setter to decrease the charging rate to a predeteimined percentage of the charging rate; and
when (i) the measured frequency is higher than an upper limit of the normal range and (ii) the obtained power system frequency is within a second non-sensitive zone ranging from a second frequency higher than the rated frequency to the rated frequency, adjusts the discharging rate set by the setter to decrease the discharging rate to a predetermined percentage of the discharging rate.
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Accused Products
Abstract
A storage battery controller includes a charging/discharging rate setter which sets a rate at which the battery is charged/discharged to approximate the power system frequency to rated frequency; and a charge and discharge controller which controls charge and discharge of the battery, in which the gain adjuster: when the measured charge level is lower than a lower limit of a normal range and the obtained power system frequency is within a first non-sensitive zone ranging from a first frequency lower than the rated frequency to the rated frequency, decreases the charging rate to a predetermined percentage of the charging rate; and when the measured frequency is higher than an upper limit of the normal range and the obtained power system frequency is within a second non-sensitive zone ranging from a second frequency higher than the rated frequency to the rated frequency, adjusts the discharging rate to decrease the discharging rate.
9 Citations
16 Claims
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1. A storage battery control device for controlling charge and discharge of a storage battery to regulate power system frequency of an electric power system, the storage battery control device comprising:
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a frequency obtainer that obtains the power system frequency; a charge level meter that measures a charge level of the storage battery; a setter that sets a charging rate or a discharging rate according to the obtained power system frequency, the charging rate being a rate at which the storage battery is charged to approximate the power system frequency to rated frequency, the discharging rate being a rate at which the storage battery is discharged to approximate the power system frequency to the rated frequency; an adjuster that adjusts the charging rate or the discharging rate set by the setter, according to the obtained power system frequency and the measured charge level; and a charge and discharge controller that controls charge and discharge of the storage battery based on the adjusted charging rate or the adjusted discharging rate, wherein the adjuster; when (i) the measured charge level is lower than a lower limit of a normal range and (ii) the obtained power system frequency is within a first non-sensitive zone ranging from a first frequency lower than the rated frequency to the rated frequency, adjusts the charging rate set by the setter to decrease the charging rate to a predeteimined percentage of the charging rate; and when (i) the measured frequency is higher than an upper limit of the normal range and (ii) the obtained power system frequency is within a second non-sensitive zone ranging from a second frequency higher than the rated frequency to the rated frequency, adjusts the discharging rate set by the setter to decrease the discharging rate to a predetermined percentage of the discharging rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16)
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15. A storage battery control method for controlling charge and discharge of a storage battery to regulate power system frequency of an electric power system, the method comprising:
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obtaining the power system frequency; measuring a charge level of the storage battery; setting a charging rate or a discharging rate according to the obtained power system frequency, the charging rate being a rate at which the storage battery is charged to approximate the power system frequency to rated frequency, the discharging rate being a rate at which the storage battery is discharged to approximate the power system frequency to the rated frequency; adjusting the charging rate or the discharging rate set in the setting, according to the obtained power system frequency and the measured charge level; and controlling charge and discharge of the storage battery based on the adjusted charging rate or the adjusted discharging rate, wherein in the adjusting, when (i) the measured charge level is lower than a lower limit of a normal range and (ii) the obtained power system frequency is within a first non-sensitive zone ranging from a first frequency lower than the rated frequency to the rated frequency, the charging rate set in the setting is adjusted to decrease the charging rate to a predetermined percentage of the charging rate, and when (i) the measured charge level is higher than an upper limit of the normal range and (ii) the obtained power system frequency is within a second non-sensitive zone ranging from a second frequency higher than the rated frequency to the rated frequency, the discharging rate set in the setting is adjusted to decrease the discharging rate to a predetermined percentage of the discharging rate.
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Specification