Invention Grant
US09176201B2 Ground fault detection device, ground fault detection method, solar energy system, and ground fault detection program
有权
接地故障检测装置，接地故障检测方法，太阳能系统和接地故障检测程序
- Patent Title: Ground fault detection device, ground fault detection method, solar energy system, and ground fault detection program
- Patent Title (中): 接地故障检测装置，接地故障检测方法，太阳能系统和接地故障检测程序
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Application No.: US14236462Application Date: 2012-07-31
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Publication No.: US09176201B2Publication Date: 2015-11-03
- Inventor: Takafumi Ishii , Taeko Kamegawa , Masanobu Yoshidomi
- Applicant: Takafumi Ishii , Taeko Kamegawa , Masanobu Yoshidomi
- Applicant Address: JP Tokyo
- Assignee: JX NIPPON OIL & ENERGY CORPORATION
- Current Assignee: JX NIPPON OIL & ENERGY CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2011-168694 20110801
- International Application: PCT/JP2012/069454 WO 20120731
- International Announcement: WO2013/018795 WO 20130207
- Main IPC: G01R31/14
- IPC: G01R31/14 ; G01R31/40 ; H02H3/16 ; H02M1/32 ; G01R31/02 ; H01L31/02 ; H02S50/10
Abstract:
In a ground fault detection device, two photovoltaic strings are disconnected from a photovoltaic power generation system, measurement for one photovoltaic string is performed by a measuring instrument, and in parallel therewith, the other photovoltaic string before measurement is charged/discharged by a charging/discharging unit by executing various functions of the calculation control unit. In other words, charging/discharging of the photovoltaic string is performed in advance at the same timing as the measurement of the photovoltaic string so that the measurement can be performed immediately after the photovoltaic string is connected to the measuring instrument in a subsequent step.
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