Mitigation of temporary overvoltages in weak grids connected to DFIG-based wind farms

Abstract EN

The level of temporary overvoltage (TOV) has a strong effect on wind turbine power system reliability.

TOV magnitude depends up on the state at which the circuit breaker contacts close.

This paper investigates the mitigation of TOV in weak grids connected to DFIG-based wind farms.

Preinsertion resistor (PIR), Controlled switching of circuit breaker, Shunt reactor, and Surge arresters are applied as protective devices to mitigate TOVs under various operation conditions such as symmetrical or unsymmetrical switching of circuit breaker.

Alternating Transient Program (ATP) is used in this study to simulate of the investigated system and the elements of mitigation devices.