Analysis of the electric railway loading impact on the operation of the generator negative current protection

With the rapid development of electric railway, the negative current injected to the power system increases obviously, and effects increasingly on the power system. Based on the regional power supply network of railway loading, the simulation model is conducted using PSCAD/EMTDC. The paper analyzes the negative current that occurs in the generator stator by simulating the model, and studies further that negative current of electric railway impacts on the operating characteristics of generator negative current protection, and changing the transmission distance of the power line affect on the negative current in the power system. It gives some advices about regulating the setting value of the over-load of rotor negative current.