主变重瓦斯跳闸接点并联改串联改造方法

A Method of Transforming Parallel Connection to Series Connection for Main Transformer Heavy Gas Trip Contact

针对重瓦斯保护装置抵抗外界干扰的性能较差、易发生误动的问题,提出主变重瓦斯跳闸接点并联改串联改造方法,并结合现场实际情况对重瓦斯端子进行改造。实践证明,该方法能显著减少主变气体继电器内干簧管触点振动导通导致的重瓦斯保护误动作,提高电网的可靠性和稳定性。

In this paper,a method of transforming parallel connection to series connection for main transformer heavy gas trip contact is proposed,and the heavy gas terminals are reconstructed according to the practical situation.It is proved that this method can significantly reduce the malfunction of heavy gas protection caused by onstate reed switch contact in gas relay of main transformer,and improve the reliability and stability of the grid.