Method and apparatus for control battery and specification determining method of battery
A battery control apparatus of this invention is provided which comprises: a battery installed on a feeder of a utility distribution system; batteries installed between pole-mounted transformers and branch points of the distribution lines; a communication network to transmit measurement data measured by meters; a battery control quantity calculation unit to determine battery control quantities from the measurement data acquired from the communication network; a load data collection unit to collect load data representing a combination of power consumption by a plurality of loads and generated power of distributed power generations; a frequency conversion unit to perform a frequency analysis on the load data; an intermediate-cycle component extraction unit to extract intermediate-cycle components; a battery control quantity calculation unit to determine battery control quantities from the extracted intermediate-cycle components; and a battery control command transmission unit to transmit the calculated control quantities to the batteries.
1. A battery control apparatus to control a battery connected to a power system, comprising:
a load data collection unit which collects load data in the system;
a frequency determining unit which determines a first frequency and a second frequency larger than the first frequency, among frequencies converted from the load data;
an intermediate-cycle component extraction unit which extracts load variation components of intermediate-cycle in a range from the first frequency to the second frequency, based on the frequencies determined by the frequency determining unit;
a control unit which controls the battery based on the extracted load variation components; and
a parameter learning unit which collects and learns parameter information including load variation components in the system, wherein
the frequency determining unit changes at least one of the first and second frequencies based on battery response speed information representing information of a response speed as to control of the battery and the parameter information of the parameter learning unit, and
the intermediate-cycle component extraction unit extracts the load variation components in accordance with at least one of the first and second frequencies thus changed.
2. The battery control apparatus according to claim 1 , wherein
the parameter learning unit determines whether or not there is any load variation component larger than a predetermined level in each frequency other than the intermediate-cycle, and the parameter learning unit changes, when it is determined that there is any load variation component larger than the predetermined level in one frequency other than the intermediate-cycle, at least one of the first and second frequencies so as to contain the one frequency.
3. The battery control apparatus according to claim 2 , wherein
the frequency determining unit determines a frequency having a largest average value of the load variation components based on past data of the intermediate-cycle, and changes at least one of the first and second frequencies based on the frequency thus determined.
4. The battery control apparatus according to claim 1 , wherein
the frequency determining unit determines a frequency having a largest average value of the load variation components based on past data of the intermediate-cycle, and changes at least one of the first and second frequencies based on the frequency thus determined.
5. The battery control apparatus according to claim 1 , further comprising:
circuitry and a processor configured to effect the: the load data collection unit, the frequency determining unit, the intermediate-cycle component extraction unit, the control unit and the parameter learning unit.