220kV智能变电站继电保护与控制技术分析

Analysis of Relay Protection and Control Technology in 220 kV Smart Substations

深入探讨220kV智能变电站中的继电保护与控制技术,详细介绍智能变电站中继电保护装置测量数据的采集与处理、继电保护装置的动作报表与后台处理,以及合并单元与智能终端的作用。同时,对220kV变电站保护装置的线路过流保护、距离保护、零序电流保护、纵联差动保护、变压器瓦斯或差动保护以及母线差动保护等多个方面进行综合技术分析。此外,探讨低频低压减载装置在电力系统中的实际应用效果,为智能电力系统的继电保护与控制提供重要的参考依据。

This study aims to provide an in-depth analysis of relay protection and control technology in 220 kV smart substations.It elaborates on the measurement data collection and processing,action reporting,backend processing of relay protection devices,and the role of merging units and smart terminals within smart substations.At the same time,a comprehensive technical analysis of protection configurations in 220 kV substations is presented,covering aspects such as overcurrent protection,distance protection,zero-sequence current protection,longitudinal differential protection,transformer gas or differential protection,and busbar differential protection.The study also examines the practical application and effectiveness of low-frequency and low-voltage load shedding devices in power systems,providing valuable insights for the relay protection and control of smart power systems.