基于分布式发电的变电站过电压自动化防护方法

Automatic Protection Method for Overvoltage in Substation Based on Distributed Generation

针对传统过电压防护方法在进行变电站防护时电压波动较大,导致防护效果差的问题,提出基于分布式发电的变电站过电压自动化防护方法。首先,确定过电压侵入变电站的途径,详细设置变电站的电缆连接方式,以确保过电压不会通过电缆传入变电站。其次,获取保护器连接线的最小横截面积,以确保保护器的有效性。最后,安装接口电压保护器,以防止过电压对变电站设备的损害。结果表明,该防护方法在防护时电压基本没有波动,防护效果较好,可以显著提高变电站的运行稳定性。

Aiming at the problem of large voltage fluctuations and poor protection effect caused by traditional overvoltage protection methods in substation protection,a distributed generation based substation overvoltage automation protection method is proposed.Firstly,determine the path of overvoltage intrusion into the substation,and set up the cable connection method of the substation in detail to ensure that overvoltage will not be transmitted to the substation through cables.Secondly,obtain the minimum cross-sectional area of the connecting wire of the protector to ensure its effectiveness.Finally,install interface voltage protectors to prevent damage to substation equipment from overvoltage.The results show that the protection method has basically no voltage fluctuations during protection,and the protection effect is good,which can significantly improve the operational stability of the substation.