Electric power produced by renewable energy resources has been increased drastically, where the wind generation plays the dominant role in supplying green energy. Due to the limited available sites for onshore wind farms, offshore wind generation has attracted much attention in recent years. Technical challenges for offshore wind power plants connecting to the onshore power grid include transmission and operation issues such as low voltage ride-through capability and dynamic voltage support. The purpose of this paper is to perform a study of applying static reactive power compensators (STATCOMs) to provide voltage support for offshore wind power plants to meet the low voltage ride-through requirement when connecting to the onshore power grid. The required STATCOM capacity to meet voltage sag regulations imposed by grid codes for the investigated offshore wind power plant is also presented.