MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641022235 A) filed by Perl Institute Of Technology, Chennai, Tamil Nadu, on Feb. 25, for 'an enhanced mppt technique of solar pv system utilizing negative current correction control for steady power output under dynamic solar irradinace.'
Inventor(s) include Dr. Tamilamuthan R; Ms. Sridevi T; Ms. Anitha R; Ms. Aiswarya R; Mr. Joyel Roy S; and Ms. Sowmya M.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention discloses an enhanced Maximum Power Point Tracking (MPPT) control technique for solar photovoltaic (PV) systems operating under rapidly varying irradiance conditions. Conventional Perturb and Observe (P&O) algorithms, though widely adopted for their simplicity, exhibit instability and erroneous duty-cycle decisions when transient disturbances produce negative current measurements due to sensor noise, converter dynamics, or abrupt environmental changes. Such negative power events degrade tracking accuracy and voltage stability in applications requiring reliable DC output, including electric-vehicle charging stations, DC microgrids, and standalone PV power systems. To overcome these limitations, the proposed method introduces a Negative Current Correction {NCC) stage within the P&O MPPT framework. The controller continuously measures PV voltage and current and, upon detecting negative current during transient events,.replaces the current value with its absolute magnitude prior to power computation. This ensures that the MPPT decision process always utilizes positive power, thereby preventing oscillatory perturbations and instability in duty-cycle adjustment of the DC-DC boost converter. The algorithm then perturbs the duty cycle within predefined bounds to achieve smooth and rapid convergence to the maximum power point while maintaining regulated DC-bus voltage. The system is modeled using a single-diode PV equivalent circuit and validated under dynamic irradiance conditions. Experimental and simulation results demonstrate improved tracking accuracy, reduced voltage oscillations, fast settling time, and stable DC output in the 320-350 V range. The technique preserves the low-cost and computational simplicity of conventional P&O while significantly enhancing robustness for real-time renewable-energy applications."
Disclaimer: Curated by HT Syndication.
