Comparing with traditional power transmission system planning, there are more uncertain factors to be processed during power transmission system planning under electricity market environment.

与传统的输电系统规划相比，电力市场环境下的输电系统规划需要处理更多的不确定因素。

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Optimal multistage transmission system expansion planning is a large-scale nonlinear combinatorial optimization problem.

多阶段输电系统规划问题是一个复杂的非线性组合优化问题。

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The examples of the transmission planning indicates that the model this paper proposed can think over the short-circuit current of the power system, so that the planning result can be more reasonable.

最后进行了电力系统优化规划计算，实践证明采用该模型的计算结果能够综合考虑系统短路电流的问题，从而使规划方案更为科学合理。

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