# US 2014/0191577 A1 · Peak-cut control device

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- Number: US 2014/0191577 A1
- Document ID: US20140191577A1
- Status: Published application
- Kind: A1
- Application number: 14/206,975
- Filed: 2014-03-12
- Published: 2014-07-10
- Earliest claimed: 2011-09-13
- Assignees: Japan Wind Development Co., Ltd.
- Applicants: Japan Wind Development Co., Ltd.
- Inventors: Matsuo Bando
- Web page: https://patentgrep.com/patent/US20140191577A1

## CPC

- H02J 3/003: {Load forecast, e.g. methods or systems for forecasting future load demand}
- H02J 3/381: {Dispersed generators}
- H02J 3/466: Scheduling or selectively controlling the operation of the generators or sources, e.g. connecting or disconnecting generators to meet a demand
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02J 2101/20: Dispersed power generation using renewable energy sources
- H02J 2101/28: Wind energy
- Y04S 10/50: Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

A peak-cut control device is provided with a storage battery having a power generation device and a storage battery for charging/discharging a part of power generated by the power generation device. The peak-cut control device includes a difference power calculating section that calculates differential power between a planned power generation amount in the power generation device determined based on a temporary peak cut amount and a demand prediction power amount that predicts a power demand for each predetermined time, and also includes a peak-cut amount calculating section that compares the calculated differential power with chargeable power or dischargeable power per unit time of the storage battery every predetermined time and simulating charge/discharge of the difference power to/from the storage battery and an increase/decrease in the temporary peak-cut amount.

## Claims

### Claim 1

A peak-cut control device in a natural energy power generation system including a storage battery having a natural energy power generation device and a storage battery for charging/discharging a part of power generated by the natural energy power generation device, the peak-cut control device comprising:
a difference power calculating section that calculates differential power between a planned power generation amount in the natural energy power generation device determined based on a temporary peak cut amount and a demand prediction power amount that predicts a power demand for each predetermined time; and
a peak-cut amount calculating section that compares the differential power calculated by the difference power calculating section with chargeable power or dischargeable power per unit time of the storage battery every predetermined time and simulating charge/discharge of the differential power to/from the storage battery and an increase/decrease in the temporary peak-cut amount.

### Claim 2 (depends on 1)

The peak-cut control device according to claim 1, wherein the peak-cut amount calculating section simulates:
an increase in a charging power amount and the increase in the temporary peak-cut amount through the charge of the storage battery so that the temporary peak-cut amount is maximized within a range in which the differential power is smaller than the chargeable power, and
a decrease in the charging power amount and the decrease in the temporary peak-cut amount through the discharge of the storage battery so that the temporary peak-cut amount is minimized within a range in which the differential power is smaller than the dischargeable power.

### Claim 3 (depends on 1)

The peak-cut control device according to claim 1, wherein the peak-cut amount calculating section simulates:
an increase in a charging power amount and the increase in the temporary peak-cut amount through the charge of the differential power to the storage battery so that the temporary peak-cut amount is maximized within a range in which a charging power amount of the storage battery does not exceed a charging limit, and
a decrease in the charging power amount and the decrease in the temporary peak-cut amount through the discharge of the differential power from the storage battery so that the temporary peak-cut amount is minimized within a range in which the charging power amount of the storage battery does not exceed a discharging limit in place of the simulation according to claim 1.

### Claim 4 (depends on 1)

The peak-cut control device according to claim 1, wherein the peak-cut amount calculating section simulates:
an increase in a charging power amount and the increase in the temporary peak-cut amount through the charge of the differential power to the storage battery so that the temporary peak-cut amount is maximized within a range in which the differential power is smaller than the chargeable power and the charging power amount of the storage battery does not exceed a charging limit, and
a decrease in the charging power amount and the decrease in the temporary peak-cut amount through the discharge of the differential power from the storage battery so that the temporary peak-cut amount is minimized within a range in which the differential power is smaller than the dischargeable power and the charging power amount of the storage battery does not exceed a discharging limit in place of the simulation according to claim 1.