Auxiliary Power Supply System with Grid Connected Power Supply and High Frequency Converter Technology of Ningbo Rail Transit Vehicles

Auxiliary Power Supply System with Grid Connected Power Supply and High Frequency Converter Technology of Ningbo Rail Transit Vehicles

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For the purpose of improving the redundancy of the auxiliary power supply system of the metro vehicles, the grid connected power supply technology and the high-frequency converter technology were applied to line 4 and line 2 hbl5266ca phase II project of the Ningbo metro.4 SIV were grid connected to provide AC 380 V to the metro vehicles which grouping up with 4 motor cars and 2 trail cars.Meanwhile, 4 DC charger provided DC 110 V to the DC control circuit and the storage battery.The circuit composition, principle and characteristics of metro vehicle power supply system of Ningbo rail transit line 4 and line 2 phase II a&d ej-123 project were expounded.The application of grid connected power supply technology would improve the redundancy of auxiliary power supply system of metro vehicles.