Design of DC Operating Powerfor for Metro Platform Screen Doors

According to the load requirements, the DC operating power system adopting high-frequency charger module and maintained-free battery group, system protection methods including TN-S earthing, door body keeping equal potential with the steel track, and also isolating from platform construction are designed for Metro Platform Screen Doors (PSD). One cycle of open and close door is considered a short impact to determine the time of electrical discharge of the battery group. The terminal voltage and battery storage capacity as constraints, the total fee is regarded as a goal function to reasonably obtain the optimized number of high-frequency charger module and battery group by optimized calculation. One optimized example is given. The assessment guidelines on electromagnetic compatibility for the DC Operating Power was proposed, that also could be available for inspection of the same type of subway equipment. The design and assessment guidelines have been widely used in the relevant Platform Screen Door projects.