Railway locomotive auxiliary converter output grounding fault detection circuit, device and method

• Main Authors: JIANG HAITAO, LYU YANWEN, SHAN BAOYU, LU CHAO
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a railway locomotive auxiliary converter output grounding fault detection circuit, which realizes the real-time detection of the railway locomotive auxiliary converter output grounding fault through a neutral point of a three-phase isolation transformer at the output side of an auxiliary converter, a resistor and a voltage sensor. Signals detected by the voltage sensor are sent to the auxiliary converter controller, then the auxiliary converter controller judges whether a ground fault occurs or not according to the signals output by the voltage sensor, and if the ground fault occurs, fault information is transmitted to a locomotive cab display screen in real time through a locomotive network system. A driver is prompted that the locomotive has the auxiliary converter output grounding fault at present, the fault point can be quickly positioned, and more serious accidents can be avoided at the same time. 本发明提供一种铁路机车辅助变流器输出接地故障检测电路，通过辅助变流器输出侧三相隔离变压器的中性点，外加一个电阻和一个电压传感器，实现铁路机车辅助变流器输出接地故障实时检测