Active power translation droop control method for converter station of MTDC system

Abstract

Abstract The DC transmission system with wind farm has the characteristics of power and frequency follow-up, it is difficult to realize the stable control of power and voltage in the common control mode of converter station. In order to improve the steady-state characteristics of the active power control of the multi-terminal HVDC (MTDC) power system with wind farms, to eliminate the static deviation existing in the system and avoid the system overvoltage during the operation, the model for MTDC system with wind farms was established and analysed. And a control strategy for p-u sagging curve translation through power measurement is proposed in this paper. A four-terminal VSCMTDC simulation model in the Matlab/Simulink platform is built. And the proposed MTDC system control strategy is verified under the different simulation conditions. It can ensure that the system transmits active power within the rated capacity range and the DC voltage of the converter stations is stable and accurate.