浅析某电厂励磁变故障原因及防范措施

Analysis on the Causes of the Excitation Failure of a Factory and the Preventive Measures

某电厂2台600 MW机组,两台机励磁变均采用树脂浇筑干式变压器,三相独立,机组励磁采用ABB UNITROL 5000型调节器。2005年投产,至2019年5月发生故障,励磁变故障烧毁更换。本文通过对#5机励磁变压器出现的故障进行分析,提出针对性防范措施。

Two 600 MW units in a power plant,both of which are made of resin-cast dry-type transformers,are three-phase independent.The ABB UNITROL 5000 regulator is used for excitation.It was put into operation in 2005,and it failed in May 2019.The excitation became faulty and burned and replaced.After the failure of the#5 machine excitation transformer is analyzed and targeted preventive measures are proposed.