MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202641111079 A) filed by Rajalakshmi Engineering College on September 16, 2026, for Cascaded H-Bridge Multilevel Inverter For Minimization Of Total Harmonic Distortion Using Sparrow Search Algorithm.
Inventors include Dr. P. Kumar; and Sai Ruthwik Vattigunta.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: ABSTRACT The present invention discloses a Cascaded H-Bridge Multilevel Inverter for Minimization of Total Harmonic Distortion Using Sparrow Search Algorithm (SSA), designed to improve power quality and enhance the performance of power conversion systems. The invention integrates a plurality of DC power sources, cascaded H-bridge inverter cells, voltage and current sensing modules, 'harmonic analysis units, intelligent optimization modules and' adaptive switching control mechanisms into a unified power electronic framework. The inverter generates multilevel output voltage waveforms through the coordinated operation of multiple H- bridge cells, thereby producing output characteristics that closely resemble a sinusoidal waveform. Real-time voltage and current measurements are continuously acquired through sensing modules and processed by a digital controller equipped with harmonic analysis capabilities. A Fast Fourier Transform (FFT)-based harmonic analysis module computes the Total Harmonic Distortion (THD) and identifies dominant harmonic components present in the inverter output. The calculated harmonic information is supplied to a Sparrow Search Algorithm optimization engine, which intelligently determines optimal switching angles by minimizing a predefined harmonic objective function. Based on the optimized switching parameters, a switching angle generation module and PWM gate pulse generation unit produce control signals for the inverter switching devices. The system further incorporates a closed-loop feedback mechanism that continuously monitors inverter performance and dynamically updates switching parameters in response to variations in load conditions, source fluctuations and operating environments. The invention significantly reduces harmonic distortion, improves output waveform quality, decreases switching losses, enhances inverter efficiency and ensures superior grid compatibility. Furthermore, the system supports renewable energy integration, smart grids, industrial motor drives, electric vehicle charging systems and distributed generation applications requiring high-quality AC power conversion. The invention provides an intelligent, adaptive and self-optimizing framework for harmonic minimization by combining advanced multilevel inverter technology with Sparrow Search Algorithm-based optimization, thereby offering a reliable and efficient solution for modern power electronic systems. Keywords: Cascaded H-Bridge Multilevel Inverter, Total Harmonic Distortion, Sparrow Search Algorithm, Harmonic Minimization, Power Electronics, FFT Analysis, PWM Control, Renewable Energy Integration, Smart Grid, Power Quality Enhancement. F'T
Disclaimer: Curated by HT Syndication.
