To realize the consumption of renewable energy such as wind power and photovoltaics in system, integration system via modular multilevel converter (MMC)-based high voltage direct current (MMC-HVDC) has been widely applied. However, with large-scale grid connection units, sub-synchronous oscillation (SSO) is prone to occur. Aiming at problem, this paper proposes an SSO suppression strategy for M...

The periodically time-varying forces make the equilibrium state of Beihawk, an X-shaped flapping-wing aircraft, to be a periodic limit cycle oscillation. However, traditional controllers based on averaging theory fail suppress this oscillation and derived stability result may inaccurate. In study, period-based method is proposed design suppression controller, locate corresponding analyze its st...

The extended state observer (ESO) plays an important role in the design of feedback control for nonlinear systems. However, its high-gain nature creates a challenge engineering practice cases where output measurement is corrupted by non-negligible, high-frequency noise. presence such noise puts constraint on how high gains can be, which forces trade-off between fast convergence estimates and qu...

With the participation of wind power in grid frequency modulation, fatigue load turbine increases accordingly. A new control method that considers both and output (WT) is proposed this paper. linear active disturbance rejection (LADRC) designed applied for pitch angle reduction control. The particle swarm optimization (PSO) algorithm used to optimize parameters controller, total variation shaft...