220 kV智能变电站不全停二次设备改造方案

目前在运的智能变电站存在部分不达标的智能二次设备，为电网安全运行埋下了隐患，需进行设备更换及整改调试。为防范改造过程中可能发生的安全风险，针对220 kV智能变电站不全停方式下开展二次设备改造的实施方案进行研究，提出了分间隔停电改造合并单元、智能终端等二次智能设备的调试工法和二次安全措施。该方案根据不同间隔改造时的安全风险点制定一对一的双重化安全措施，安全性高、操作性强，并在路平变电站的智能设备改造中得到了有效运用。

Scheme for Secondary Devices with Incomplete Power Shutoff of 220 kV Smart Substation

At present, there are numbers of substandard secondary intelligent devices operating in the smart substation, which are potentially risky. It is necessary to replace, rectify and debug such substandard devices. In order to prevent the security risks that may occur in the process of renovation. A study is made on the secondary device renovation scheme with incomplete shutoff of 220 kV smart substations. The proposed scheme includes rotatory power shutoff of different bays for merging unit renovation, debugging methods for such secondary smart devices as intelligent terminals, and the secondary security measures. The scheme formulates one-on-one dual security measures according to the security risks in the process of renovating different intervals. The scheme is characterized with high security and strong operability, and has been successfully implemented in the intelligent equipment renovation of Lu Ping substation.