Abstract
Considering the effect of LNG supplying risk on the combined gas and electricity system's operation under the multi-gas-source supply background, the optimization planning model of the combined system's LNG reserve is developed in this paper. The optimization objective of this model is minimizing the annual cost of combined system, considering operation simulation of several typical scenarios along 52 weeks in a whole year and the annualized investment of LNG tanks. The operation objective of each scenario is determined by LNG's arrival and the operation mode of LNG terminals. A test system of IEEE-39 test system and Belgian 20-node system is formulated. The optimal LNG reserve of the test system is solved, and the effect of load level and operation mode on the reserve planning is also analyzed.
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