MUMBAI, India, Jan. 9 -- Intellectual Property India has published a patent application (202521100868 A) filed by Singh, Varsha; Neti, Sukhdev Singh; and Anand, Vishal, Raipur, Chhattisgarh, on Oct. 17, 2025, for 'a fault-tolerant single-phase five-level transformer-less inverter.'
Inventor(s) include Singh, Varsha; Neti, Sukhdev Singh; and Anand, Vishal.
The application for the patent was published on Jan. 9, under issue no. 02/2026.
According to the abstract released by the Intellectual Property India: "The present invention is related to a fault-tolerant single-phase five-level transformer-less inverter (101) for reliable grid-connected photovoltaic (PV) systems. utilizes a photovoltaic source (102) and three switched capacitor cells (103, 104, 105) C1, C2, and C3 to generate a five-level output voltage (+2Vin, +Vin, 0, -Vin, -2Vin). Each capacitor cell includes multiple power switches (S1-S12) to implement various switching combinations. In normal operation, all three capacitor cells charge and discharge cyclically to reduce electrical stress. In fault conditions, the inverter maintains continuous operation by dynamically adjusting switching strategies allowing any two functioning capacitors to sustain the output when one fails. The filter inductor (106) smooths the output before delivering power to the utility grid (107). It enhances inverter reliability and voltage boosting without a transformer, making it efficient and fault-resilient for PV applications. The five-level waveform and capacitor voltage stability confirm effective performance with reduced ripple and harmonic distortion."
Disclaimer: Curated by HT Syndication.
