MUMBAI, India, July 11 -- Intellectual Property India has published a patent application (202521058657 A) filed by Saurabh Krushnatrao Bhise; and Suhas Shashikant Khot, Pune, Maharashtra, on June 18, for 'transformerless multilevel inverter system for single-phase photovoltaic grid integration.'
Inventor(s) include Saurabh Krushnatrao Bhise; and Suhas Shashikant Khot.
The application for the patent was published on July 11, under issue no. 28/2025.
According to the abstract released by the Intellectual Property India: "Inverters are used to connect the solar PV to the grid. There are two types of grid-tied PV: isolated and transformer-less. Among these, transformer-less method is mostly preferred by the researchers. Several works have been proposed based on transformerless inverters with PVs. However, most existing works have disadvantages like high leakage current and harmonics. A unique transformer-less multi-level inverter with fewer switches and a single source is created to address these problems. The perturb and observe (P&O) based maximum power point tracking (MPPT) method is used to track the maximum power point from solar PV. The MPPT controller provides the switching pulses to the boost converter. Additionally, the Osprey optimization algorithm (OOA) optimized cascaded fractional order proportional integral proportional derivative (CFOPI-PD) controller is proposed to provide the switching pulses for the inverter. The performance of the proposed methodology is verified in the MATLAB/SIMULINK tool. The leakage current in the transformerless inverter leads to system instability and harmonics. Using this method, a reduced leakage current of 0.05A was achieved. The efficiency of the converter has been observed as 98.41%. The proposed inverter obtained 0.71% total harmonic distortion (THD) which is lower than the existing inverter topologies."
Disclaimer: Curated by HT Syndication.
