Hvdc System Control

As burgeoning technic, HVDC is attached importance broadly. Control and protect section is the most pivotal section in HVDC system. This paper designed a nonlinear controller for HVDC system by the relation extent method. Then validate it by digital simulation. The transient stability of interconnected AC system can be improved by the fast response of HVDC. This paper designed an additional controller by fuzzy control method. The additional controller makes AC system more steady by the HVDC emergency support.