Engineering Picture       The Yunnan Chuxiong Converter Station is the world's first UHV DC transmission project and my country's first UHV DC transmission autonomous demonstration project. The comprehensive noise control project of Yunnan Chuxiong Converter Station started in January 2012 and was completed in August 2012. The amount of work involved the production and installation of sound insulation barriers, sound insulation windows, sound insulation doors and related auxiliary materials.