Differential flatness-based system-level control strategy for flexible DC grids
To address the issues of power coordination control and DC voltage stability for large power flexible DC grids under different operating conditions,a system-level control strategy for flexible DC grids based on differential flatness control(DFC)theory was proposed.On the basis of analyzing the differential flatness of flexible DC grids,an improved adaptive droop controller based on DFC was designed by introducing dual influencing factors,namely power margins and DC voltage deviation.The presented controller can enhance the stability,dynamic response capability,and anti-interference ability of the system.Finally,the effectiveness of the proposed control strategy was validated by building Zhangbei flexible DC grids model on the PSCAD/EMTDC simulation platform.
modular multilevel converterflexible DC gridsdifferential flatnessadaptive droop
万方数据
维普
