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公开(公告)号：US20190178923A1
公开(公告)日：2019-06-13
申请号：US16278224
申请日：2019-02-18
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhangping Shao , Kai Xin , Congyuan Wang
Abstract: An islanding detection method and apparatus for an inverter, and a power supply system to resolve a problem that an existing voltage total harmonic distortion (THD)-based islanding detection method has low islanding detection reliability due to existence of a relatively large detection dead zone. According to this detection method, the voltage total harmonic distortion changes more significantly before and after the islanding effect of the inverter occurs in order to reduce an islanding detection dead zone and improve islanding detection reliability.
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