Most upcoming wind farm locations are sited in weak areas of the transmission grids, and this accordingly calls for a customised fault ride through (FRT) strategies to secure a reliable operation of the wind farm. Transmission system operators (TSOs) stipulate that large wind farms should be able to assist in a stable operation of the transmission grids. This paper will present a procedure for developing an optimal FRT strategy relevant for upcoming wind farms. Different FRT strategies are analysed through simulations of the dynamic behaviour of a wind farm during severe fault sequences. The aim of the simulations is to determine an optimised FRT strategy. The optimisation is performed according to the criteria that transient stability problems have to be avoided while the responses of the wind farm are in compliance with the dynamic connection requirements in the grid code. The grid code is defined as a summation of the most stringent connection requirements in Europe. The operational characteristics of the wind farm are optimised by adjusting the parameter settings of a model of a simplified PQ-generator. The dynamic simulations are performed in PSS/E. The simulation studies demonstrate that it is possible to increase the connectable wind farm capacity to a given grid configuration by optimising the FRT settings. The optimised FRT strategy is composed of two main requirements: The active power should instantaneously be as low as possible and the reactive power should instantaneously be as high as possible whenever a fault occurs. Both requirements increase the transient stability which is a serious concern during fault occurrences in weak networks. It is concluded that a customised fault ride through strategy can ensure a more reliable operation of the wind farm and the surrounding transmission grid during fault occurrences.