This paper researches in urban power network planning. It includes the load forecasting of urban power network, the site of the power stations, the transmission and distribution network planning.

本论文主要研究城市电网规划方案，包括城市电网的负荷预测、变电站所址的规划、输电网架及其配电网的规划。

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Urban medium-voltage distribution network, one of the most important parts of power system, is expected to distribute electric energy to consumers with considerable security and reliability.

城市中压配电网是整个电力系统的重要组成部分，其功能是将电力安全、可靠地分配到用户。

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To lift the voltage level of distribution network is an effective method to enlarge the power supply capacity of the urban network.

提高配电网电压等级是提升城市电网供电能力的有效途径。

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