Cooperative Fault Ride Through Strategy for Paralleled Grid-Tied Converters

Abstract Parallel systems are the trend of grid-tied converters, which can improve transmission power. Under fault conditions, operation converter needs to be switched safely ensure no disconnection. The cooperation between multiple converters better cope with conditions and support grid voltage. This paper proposes a coordinated ride through strategy. strategy that transfer required reactive power into according their ability, calculates current feasible region. residual capacity is used transmit photovoltaic within Thus, operate safety region help restore Simulation results verify correctness proposed