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中文摘要：
输电投资项目在市场环境下具有较多的不确定性，由此产生的各种风险，特别是净现金流和折现率的随机波动给输电项目的投资决策带来了许多问题。本文将区间数学引入项目经济评价研究中，分别建立了基于区间数的净现值与内部收益率经济评价模型，这两个经济评价模型在一定程度上解决了上述净现金流和折现率波动的问题。此外，由于改进后的区间经济评价模型在判别准则方面存在不确定性，本文依据概率论理论建立了相应的风险度量模型，为投资决策者提供更为可靠的决策支持。
英文摘要：
The power industry restructuring has introduced more uncertain factors for transmission investment projects, and hence various risks. In particular, the random fluctuations of net cash flow and discount rate bring a lot of problems to the investment decision-making. The interval is introduced to economic evaluation of projects in this paper, two economic evaluation models are set up separately which are the net present value and internal rate of return based on interval. These economic evaluation models solve the fluctuations of net cash flow and discount rate to a certain extent. Moreover, as the uncertainty exists economy evaluation models based on the interval to criteria in respect, the corresponding risk measurement model is established based on probability theory in the paper, and provides more reliable decision support to investment decision-makers.
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