ZZ
DC600V train power supply system
delivery time：2 weeks
With the rapid development of railways, the train power supply system has undergone several changes, from the previous independent power supply for single trains and centralized power supply for generator cars to the current direct power supply mode for locomotives. The train power supply system is rectified and filtered to generate two DC 600V power supplies. Power for passenger trains. One of the power supplies is converted into AC380V voltage by the vehicle inverter device to supply power to the air conditioners, ventilators, electric heaters, water heaters and other related electrical equipment of the passenger train, and the other power supply is converted into DC110V voltage by the vehicle charger to provide lighting and control for the vehicle. wait for the required voltage.
The DC600V train power supply system is composed of two independent train supply cabinets. The train supply cabinet converts the single-phase alternating current AC860V of the main transformer train power supply winding into a stable DC600V direct current power supply through phase-controlled rectification. The hardware design and software control system of the two power supply cabinets are exactly the same, and the rated capacity of each power supply cabinet is up to 400KW. The main circuit adopts a phase-controlled rectifier circuit (half-controlled bridge), and the output terminal outputs 600 V DC with high precision and low harmonic content through the LC filter circuit. The power supply device can be roughly divided into two parts: control and electrical. The main electrical circuit consists of rectifiers, watt-hour meters, overvoltage absorption, discharge resistors, voltage and current sensors, filter capacitors, smoothing reactor cooling, cooling fans and other components. It has complete input over and under voltage protection, DC over and under voltage protection, output over and under voltage protection, input over current protection, output over current protection, output overload protection, output short circuit protection, overheating, main circuit grounding protection, contact fault, cooling Fan failure, control system failure and other protection functions. The running status of the system can be displayed in real time on the TCMS display screen of the main driver's desk, which can ensure a reliable, stable and efficient power supply for passenger trains.
