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公开(公告)号：US09692243B2
公开(公告)日：2017-06-27
申请号：US14440925
申请日：2013-11-19
Inventor： Mitsuru Kaji , Kenichi Watanabe , Hoday Stearns
CPC classification number: H02J7/0068 , H02J3/32 , H02J13/0006 , Y02E60/722 , Y04S10/14
Abstract: Provided is a frequency regulation method for regulating a frequency of a power system so that the frequency approximates to a rated frequency, the method including: measuring the frequency; obtaining an SOC (state of charge) of a storage battery; determining a base-point of power to be charged in or discharged from the storage battery when the measured frequency is equal to a predetermined rated frequency; determining a control variable changed from the base-point by an amount corresponding to a frequency deviation that is a difference between the predetermined rated frequency and the measured frequency; and charging or discharging the storage battery based on the control variable, wherein in the determining a base-point, a third rate of change is smaller than a first rate of change and a second rate of change that are average rates of change in the base-point with respect to the SOC when the SOC is within a first range and a second range, respectively.
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公开(公告)号：US09583945B2
公开(公告)日：2017-02-28
申请号：US14722431
申请日：2015-05-27
Inventor： Kenichi Watanabe
CPC classification number: H02J3/32 , H01L2224/14 , H02J3/24
Abstract: A frequency control method includes segmenting a range from a predetermined reference frequency to a predetermined lower limit frequency or a predetermined upper limit frequency into frequency range segments according to a number of battery apparatuses, detecting a current frequency of a power system, and causing battery apparatuses to charge from the power system or discharge to the power system in order to control a frequency or maintain a supply and demand balance of the power system, causing lager number of battery apparatuses to charge or discharge as a frequency range segment including the current frequency becomes farther apart from the reference frequency.
Abstract translation: 频率控制方法包括根据电池设备的数量，将电力系统的当前频率检测到从预定基准频率到预定下限频率或预定上限频率的范围分段到电力系统的频率范围，并且使电池装置 从电力系统充电或放电到电力系统，以便控制频率或维持电力系统的供需平衡，导致较大数量的电池装置作为包括当前频率的频率范围段充电或放电成为 远离参考频率。
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公开(公告)号：US10067493B2
公开(公告)日：2018-09-04
申请号：US14781114
申请日：2014-02-26
Inventor： Hoday Stearns , Kenichi Watanabe , Mitsuru Kaji
Abstract: A frequency control method for use in a frequency control system including: a server that receives, from a power system operator, a power command for controlling a frequency of a power grid within a predetermined frequency; at least one distributed energy resource; and a local controller connected to the server through a communication network and to the at least one distributed energy resource, the frequency control method includes: receiving the power command from the power system operator; obtaining a frequency measurement of the power grid; predicting a next power command using the frequency measurement, before the next power command is received from the power system operator; and controlling an input or output of the at least one distributed power energy resource using the predicted next power command, before the next power command is received from the power system operator.
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公开(公告)号：US10756540B2
公开(公告)日：2020-08-25
申请号：US15775832
申请日：2016-11-09
Inventor： Kenichi Watanabe
Abstract: A received power control device (200) that performs control of received energy, which is an amount of power received from a power system per predetermined time at a power receiving point to which a load (302) and an electric storage device (303) are electrically connected, the received power control device (200) performing the control by controlling charge and discharge of at least the electric storage device (303), including: a received energy obtainer (201) that periodically obtains information indicating the received energy; a controller (202) that causes at least the electric storage device (303) to discharge to prevent the received energy from exceeding a first threshold; a remaining capacity obtainer (203) that periodically obtains information indicating a remaining capacity of the electric storage device (303); and a threshold setter (204) that increases the first threshold when an amount of decrease in the remaining capacity per unit time exceeds a second threshold.
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