Design of a Monopolar LCC-HVDC Transmission System

A Simulink-based model of a 12-pulse monopolar Line-Commutated Converter (LCC) HVDC system, featuring constant current and extinction angle

This project provides a comprehensive Simulink model for a Monopolar LCC-HVDC transmission system. The model is designed to demonstrate the fundamental operating principles of line-commutated converters using thyristor-based 12-pulse bridges.Key Features :

• Topology: 12-pulse Bridge (Star-Star and Star-Delta transformer configurations) to minimize AC side harmonics.
• Control Strategy:
• Rectifier: Constant Current (CC) control to maintain stable DC power flow.
• Inverter: Constant Extinction Angle and Constant Voltage control to prevent commutation failure.
• Performance: Capable of simulating steady-state power transfer and transient responses to AC side faults.