ALEXANDRIA, Va., July 30 -- United States Patent no. 12,375,038, issued on July 29, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China).
"Impedance detection method and photovoltaic system" was invented by Jianfei Lin (Shenzhen, China), Yongbing Gao (Shanghai) and Tiansan Lin (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impedance detection method and a photovoltaic system are provided to help reduce complexity and costs of impedance detection. The method includes: sampling a voltage between a direct current bus and a protective earthing at each of a first time point and a second time point, to obtain a first voltage value and a second voltage value; sampling a l...