本文采用分层分布式结构构建电压无功协调控制系统，系统由管理级、变电站控制级和现场控制级构成。

In this article, structure of layering and distributing is introduced and the coordinated control system consists of the supervisory level, the substation control level and field control level.

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变电站的控制与信号系统是实现变电站安全、经济运行和操作管理的必不可少的重要组成部分，特别是对日常的运行控制来说，显得更加重要。

Substation's control and signal system play an important role in the safe, economical running and operation management of the substation, especially for the daily running and control.

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变电站的控制与信号系统是实现变电站安全、经济运行和操作管理的必不可少的重要组成部分，特别是对日常的运行控制来说，显得更加重要。

Substation's control and signal system play an important role in the safe, economical running and operation management of the substation, especially for the daily running and control.

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