Method for monitoring short-circuit fault between stator core and cross-core threaded rod in synchronous generator

The invention discloses a method for monitoring a short-circuit fault between a stator core and a cross-core threaded rod in a synchronous generator. A high-resistance resistor and a sampling resistor are connected with the ground, wherein the high-resistance resistor and the sampling resistor are in series connection and connected to the cross-core threaded rod which is arranged in the stator core in the synchronous generator; a momentary value of voltage across two ends of the sampling resistor are collected online, the momentary value of the voltage is compared with a fault determining threshold value, and when the momentary value of the voltage exceeds the fault determining threshold value, it is determined that the short-circuit fault occurs between the stator core and the cross-core threaded rod in the synchronous generator. The method can solve the deficiency in the prior art and improve the diagnostic ability of such faults. 本发明公开了种同步发电机定子铁心与穿心螺杆短路故障的监测方法，将同步发电机定子铁心穿心螺杆经串联的高阻值电阻和采样电阻接地，在线采集采样电阻两端的电压瞬时