Realization of Self-Defined Control System for Constant Extinction Angle Control Using PSCAD/EMTDC

In order to model real complex systems and provide designers with the possibility to study and improve strategy in PSCAD/EMTDC, the paper presents a new gamma measurement method and models a self-defined control system for constant extinction angle control on the basis of the requirement of the operation in HVDC system and the control principle of constant extinction angle. According to the comparison of two HVDC systems using different control system, the self-defined control system and the control system of CIGRE, it is proved that the self-defined control system has good control performance. The system parameters of self-defined control system can be defined, and the structure of system can be optimized according to faults, as will make the system have fault protecting function. This system provides more powerful and efficient methods for designers to model real complex systems in PSCAD/EMTDC.