Sungrow Power Supply has patented a device and system to suppress potential induced degradation in photovoltaic systems. The device includes a rectification circuit, non-isolated voltage conversion circuit, and capacitor to convert and control voltages, ensuring optimal system performance and longevity. GlobalData’s report on Sungrow Power Supply gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sungrow Power Supply, Smart energy mgmt systems was a key innovation area identified from patents. Sungrow Power Supply's grant share as of March 2024 was 63%. Grant share is based on the ratio of number of grants to total number of patents.
Device for suppressing potential induced degradation in photovoltaic systems
A recently granted patent (Publication Number: US11973349B2) discloses a device designed to suppress potential induced degradation in photovoltaic systems. The device is connected between an alternating current output terminal of a converter and a grid-connected power frequency transformer. It comprises a rectification circuit, a non-isolated voltage conversion circuit, and at least one capacitor. The rectification circuit converts alternating current into direct current, while the non-isolated voltage conversion circuit performs voltage conversion, either boost conversion or voltage reverse conversion. The capacitor is connected in parallel with the output terminal of the direct current and is directly coupled to ground through either the negative or positive electrode of the capacitor. The non-isolated voltage conversion circuit is further configured to control the output voltage to clamp the minimum and maximum voltages of the photovoltaic system based on specific setting values.
Moreover, the patent also covers a photovoltaic system incorporating the aforementioned device, along with a photovoltaic array, a converter, and a transformer. The PV array is connected to the input terminal of the converter, which, in turn, is connected to the transformer, with the output terminal of the transformer linked to a power grid or load. The device for suppressing potential induced degradation is crucial in maintaining the stability and efficiency of the photovoltaic system. It includes the rectification circuit, non-isolated voltage conversion circuit, and capacitor, with the non-isolated voltage conversion circuit controlling the output voltage to ensure the minimum and maximum voltages of the system are within specified limits. The patent also details the configuration of multiple converters in the system, emphasizing the interconnected nature of the components for optimal performance.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
