求翻译：变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用。电气主接线是发电厂变电所的主要环节，电气主接线的拟定直接关系着全厂电气设备的选择、配电装置的布置、继电保护和自动装置的确定，是变电站电气部分投资大小的决定性因素。是什么意思？

The substation is an important part of the power system, which directly affects the safety and economic operation of the entire power system, contact the power plants and users of intermediate links, plays transformation and distribution of electric energy role. The main electrical wiring is the mai

The substation is electric power systems, it important part directly affects the entire electricity system for the safe and economic operation, power plants and is the contact between the user and the transformation of the role and power distribution. Electrical main terminal substation power plant

The transformer substation is the electrical power system important constituent, it affects the entire electrical power system directly the security and the economical movement, is relates the power plant and user's middle link, is playing the transformation and the assignment electrical energy role

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