ElectricallyOperated Power Supply System
System Description
Electrically operatedpower supply, which is also called power engineering AC/DC power supply orAC/DC panel (cabinet) for short, is a power supply device used in theelectrical equipment rooms. Itis mainly used to control the loads and dynamic loads as well as DC emergencylighting loads in all levels of substations, thermal power and hydropowerplants, which is the basis of power system control and protection. In the areaof rail transit, it is mainly used to provide UPS for the divide-shut brakes inpower supply system and the instruments, meters, relay protection and emergencylighting in secondary circuit.
Basedon the nominal voltage level, electrically operated power supply is subdividedinto DC220V and DC110V systems, with options of DC-DC power conversion modules,DC-AC dedicated UPS/ powerinverter devices to complete communication power conversion of DC220V（110V）→AC220V and DC220V（110V）→AC220 V, which realized the integrated power supplysolution.
System Components
Monitoring system Centralized monitoring Input distribution Power switching, lightning protection, inputprotection Rectifier unit Voltage conversion, battery charging,losing bus output BMS battery management & battery Battery management, back-up output, closing bus output Output distribution Output assignment, output display, output protection Centralizedmonitoring Inputdistribution Powerswitching, lightning protection, input protection Rectifierunit Voltageconversion, battery charging,losingbus output BMSbattery management & battery Batterymanagement, back-up output, closing bus output Outputdistribution Outputassignment, output display, output protection Systemfeatures High reliability Itemploys the unique modular design of switching power supply, with N+1 hotbackup, which improves system reliability. Energy-saving& Environmental Protection Rectifier module utilizes advanced soft-switchingtechnology, with the module efficiency higher than 94%, which reduces energyconsumption and environmental pollution; High capacity of electromagnetic compatibility andanti-electromagnetic interference ensures system reliability, and reduces gridpollution. Lower Maintenance Cost Backplane-fixedrectifier module enables unidirectional hot swapping and ensures the safety ofworkers; Touch screen, industrialized user interface and rapidfault locating function efficiently improve the efficiency of operation. Intelligent Monitoring Fast, stable communication interface design of CANbus; System gradingmonitoring; tele-mechanical function is used to control switching actions in along distance; USB data and configuration interfaces for easyupgrading of system. Battery Management Function Intelligent batterymanagement, status monitoring, temperature compensation, internal resistancemeasurement, battery auto activation. 
