Self-Built Grid-Tied Inverter Models

Recently I've noticed numerous inquiries about inverter modeling approaches. I'm presenting below my self-developed single-phase and three-phase grid-tied inverter implementations for collaborative examination. The single-phase inverter employs fixed-step simulation methodology to facilitate detailed waveform analysis, incorporating IGBT-based bridge circuits with PID controller implementation for voltage stabilization. These inverters utilize SPWM (Sinusoidal Pulse Width Modulation) techniques with phase-locked loop (PLL) synchronization for grid integration. Through these practical examples, we can thoroughly examine inverter operational principles including DC-AC conversion mechanisms, harmonic reduction strategies, and power factor correction features. The models demonstrate real-time monitoring capabilities for key parameters like THD (Total Harmonic Distortion) and efficiency metrics. Hopefully these technical implementations provide valuable insights for power electronics research and development!