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The Australian government is aiming to ensure that by 2020, 20% of Australia's electricity supply is generated from renewable sources. Consequently, this will drive large changes and have direct effects on the behavior and investment in Australia's market environment especially transmission use of system (TUoS) charges scheme. This paper is intended to explore the TUoS charges in the Australian national electricity market (NEM) to the development of renewable generation. There are three issues that are focused in this paper: 1) the transmission configurations for connecting the renewable generation to the existing grid; 2) the existing Australian NEM TUoS charges; and 3) the Australian energy market operator (AEMO) policy on the allocation of the cost of providing shared transmission services to different parties for new and existing terminal stations. The 59-bus system of the South East Australian power system is used for the case study in order to verify the concepts and determine the efficient and economical way to connect a new renewable generation to the existing grid.