Synchronization and Reactive Current Support of PMSG-Based Wind Farm During Severe Grid Fault

摘要: Grid codes require wind farm to remain on-grid and inject specific reactive current when grid fault occurs. To satisfy the requirements, power devices, such as static synchronous compensator (STATCOM), are usually used in modern farms. In order produce currents, energy generation system (WECS) STATCOM normally controlled with phase-locked loop (PLL) oriented vector control methods. Due active imbalance between consumption, has risk of losing synchronization under severe conditions. This paper analyzes dynamic mechanism stability criteria proposes a coordinated scheme for WECS during grid-fault period. The both is remained by balancing farm. objectives generator- grid-side converters swapped avoid interaction dc-link voltage loop. synchronized produces additional currents help meet requirements code. Effectiveness theoretical analyses proposed method verified simulations.