MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202631123736 A) filed by C. V. Raman Global University on October 15, 2026, for Adaptive Power Conditioning System And Method For Photovoltaic Unified Power Quality Conditioner Using Cascaded Comb-Filter Harmonic Oscillator And Adaptive Notch Filter Control.
Inventors include Dr. Pragnyashree Ray; and Dr. Pradyumna Kumar Behera.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: An adaptive power conditioning system and method for a photovoltaic unified power quality conditioner is disclosed, comprising an adaptive notch filter engine operating in accordance with a variable leaky least mean square algorithm for real-time estimation of grid fundamental frequency and phase under distorted, noisy, and variable grid conditions. The estimated frequency is supplied to a cascaded normalized comb-filter second-order harmonic oscillator module configured to extract balanced, distortion-free positive-sequence unit templates from non-ideal three-phase grid voltages, wherein a normalization factor introduced at the harmonic oscillator output preserves unit template magnitude integrity during voltage sag, swell, and other amplitude disturbances. The generated unit templates are employed to derive a reference injection voltage for a series compensator configured to mitigate voltage sag, swell, harmonic distortion, and phase unbalance at the load terminal, and to derive a reference current for a parallel compensator configured to supply harmonic, reactive, and unbalanced current demand of the load through fundamental current extraction and quadrature-template based reactive separation. A proportional-integral controller regulates dc-link voltage with reference to a maximum power point tracking algorithm, thereby coordinating power exchange among the photovoltaic source, the utility grid, and the connected load. The disclosed system achieves simultaneous estimation accuracy and dynamic response speed, robust immunity to combined grid disturbances, and reduced computational complexity, rendering it suitable for implementation on embedded digital controllers across smart grids, microgrids, industrial facilities, and electric vehicle charging infrastructure.
Disclaimer: Curated by HT Syndication.
