求翻译：变电所是电力系统的重要组成部分，它承担着从电力系统中受电、经过变压，然后分配电能的任务，它直接影响整个电力系统的安全与经济运行。因此，变电所的设计工作是整个工程环节的关键部分。本次设计的内容为南埠商场变电所电气安全设计。文中对主接线的选择、高压设备的选择、负荷计算、短路电流计算、动稳定和热稳定校验等方面都有充分的说明。特别对主接线的选择，变压器的选择，还有电流互感器、电压互感器的选择及校验都做了详细的说明和分析。是什么意思？

Substation is an important part of the power system, which bears from the power system by electricity, through the transformer, and then assigned the task of energy, which directly affect the power system security and economic operation. Therefore, the substation design work is part of a key part of

An important component of an electrical power substation, it bears from the electric power supply system, after a transformer, electrical power distribution and then the task of the whole electrical system, it has a direct impact on security and economic operations. Therefore, transformer substation

The transformer substation is the electrical power system important constituent, it is undertaking from the electrical power system the electricity, the process live pressure, then the assignment electrical energy duty, it affects the entire electrical power system directly the security and the econ

Substations are important components of the electric power system, which carries electricity, after pressure from the power system, and assign tasks of electric energy, which directly affect the safe and economic operation of electric power system as a whole. Therefore, the substation's design work