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SUNGROW has been granted an invention patent: "A method for detecting ground impedance and an inverter system"

Article Source：Qichacha | Author：Securities Star | Issuing Time：2024.05.18
Securities Star News: According to data from Qichacha, SUNGROW (300274) has obtained a new invention patent authorization, titled "A method for detecting ground impedance and an inverter system". The patent application number is CN202111553438.9, and the authorization date is May 14, 2024.

Patent abstract: This application provides a method for detecting ground impedance and an inverter system. The detection method for ground impedance is applied to an inverter system consisting of N inverters, with the AC side of each inverter connected to the AC side of the inverter system, where N is a positive integer. In the method of detecting ground impedance, due to the correlation between each preset equation and the corresponding ground impedance of the inverter system, the impedance values of each test ground impedance, as well as the AC ground electrical quantity of the inverter system in different states and the DC ground electrical quantity of each inverter in different states, are respectively substituted into the corresponding preset equations. By solving each preset equation, the ground impedance of the inverter system can be determined. That is, the detection method for ground impedance provided in this application can accurately detect the ground impedance of the inverter system. Therefore, when the inverter system is applied to a photovoltaic power generation system, the detection method for ground impedance provided in this application can also accurately detect the various ground impedances of the photovoltaic power generation system.


Attached diagram of patent abstract

Since the beginning of this year, SUNGROW has obtained 315 new patent authorizations, an increase of 89.76% compared to the same period last year. Based on the financial data of the company's 2023 annual report, the company invested 2.447 billion yuan in research and development, a year-on-year increase of 44.63%.
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