Power electronics is a field of electrical engineering that focuses on the conversion and control of electrical power using electronic devices. It involves the use of components like transistors, diodes, and capacitors to manage the flow of electricity efficiently. Applications include power supplies, motor drives, and renewable energy systems. This technology plays a crucial role in improving energy efficiency and reducing waste. By controlling voltage and current, power electronics enables the integration of solar panels, wind turbines, and electric vehicles into the power grid, contributing to a more sustainable energy future.