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公开(公告)号：US10536001B2
公开(公告)日：2020-01-14
申请号：US15349158
申请日：2016-11-11
发明人： Yuji Matsuoka , Tatsuaki Ambo , Naoki Fujiwara , Paul Bixel , Ryuta Saka
摘要： A photovoltaic system includes photovoltaic cells, inverters, a reduced electricity output state determiner which determines whether each of the photovoltaic cells is in a reduced electricity output state, a first command value generator which generates a first command value for decreasing a first power factor of a first inverter determined as in the reduced electricity output state, a second command value generator which generates a second command value for increasing a second power factor of at least one of second inverters so as to compensate for output power of the first inverter, and a controller which controls the inverters.
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公开(公告)号：US10355487B2
公开(公告)日：2019-07-16
申请号：US15053048
申请日：2016-02-25
发明人： Takahiro Terazono , Naoki Fujiwara , Yoshio Tsuji , Shuji Tanaka
摘要： A photovoltaic system includes power generators configured to generate power utilizing sunlight, inverters configured to convert the power generated by the power generators into alternating-current power output to a power system, a first limiter configured to limit output power of the inverters not more than a predetermined capacity, a second limiter configured to limit output power of at least one of the inverters to a level exceeding the predetermined capacity limited by the first limiter, when a predetermined condition is satisfied, and an inverter controller configured to control the output power of the inverters, based on the first limiter or the second limiter.
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公开(公告)号：US09153953B2
公开(公告)日：2015-10-06
申请号：US13839889
申请日：2013-03-15
发明人： Eiichi Ikawa , Naoki Fujiwara
CPC分类号： H02H3/18 , G01R31/025 , H01L31/02021 , H02H7/20 , H02J1/10 , H02S50/10 , Y02E10/50 , Y02E10/56 , Y10T307/696
摘要： There is provided a fault detection apparatus including an open/close unit configured to open/close an electric path to pass a direct current forward, a reverse-current detector configured to detect a reverse current running through the electric path backward, and an opening unit configured to open the open/close unit when the reverse current is detected by the reverse-current detector.
摘要翻译： 提供了一种故障检测装置，包括：打开/关闭电通路以使直流电流向前通过的开/关单元，配置成检测通过电路向后流动的反向电流的反向电流检测器，以及开路单元 配置为当反向电流检测器检测到反向电流时打开/关闭单元。
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公开(公告)号：US11495970B2
公开(公告)日：2022-11-08
申请号：US16646143
申请日：2017-09-19
发明人： Naoki Fujiwara
摘要： A photovoltaic power generation system includes a plurality of photovoltaic cell arrays, a plurality of power conditioners connected respectively with the plurality of photovoltaic cell arrays, and a high order device connected to the plurality of power conditioners. The high order device is configured to execute: a first output control to adjust output power of a designated power conditioner to a predetermined output power amount being set in advance; and a second output control to adjust output power from a remaining power conditioner which is other than the designated power conditioner among the plurality of power conditioners. The high order device is configured to execute characteristic-data acquisition to acquire an input/output electrical characteristic of the designated power conditioner during execution of the first output control.
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公开(公告)号：US09712081B2
公开(公告)日：2017-07-18
申请号：US14501143
申请日：2014-09-30
发明人： Tsuguhiro Tanaka , Naoki Fujiwara
摘要： A power converter includes inverters, AC sides of the inverters being connected in parallel, and a controller configured to control total output power of the inverters by controlling output power of at least one of the inverters in a control cycle shorter than a shortest communication cycle which allows communication with each of the inverters.
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