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Research of economic evaluation methods on multi-platform power system in offshore oil field

Economic evaluation of interconnected power systems on offshore oil platforms has valuable meaning on oil exploitation, but no effective method has been proposed yet. This paper presents an overall review combining energy economics and distribution network evaluation methods to analyse the construction cost and production efficiency of the offshore power system with regard to the oil deposits and production planning in different periods. Based on the DD&A(depreciation, depletion, amortization) cost of barrel oil commonly used in the petroleum industry, the electrical DD&A cost of barrel oil was proposed for the first time to evaluate the economic performance of different power system topology . In terms of the index weight of economic evaluation methods, analytic hierarchy process is used to establish the subjective weight and the entropy weight method is used to establish the objective weight, this two weights are then compounded by using ideal point method. Finally, this paper takes an offshore oilfield in Bohai as example to verify the performance of the economic evaluation method, which is used to assess different power system topology in long-term planning. Results of the true case indicate that the method can evaluate the interconnected power systems effectively.