Shaking table test study on seismic performance of discrete switching power supply system
Switching power supply is one of the most important equipment in communication equipment buildings and base transceiver stations,which works as"heart"of them.If it fails during earthquake,the communication equipment buildings and base transceiver stations will stop working completely.Therefore,the study on seismic performance of switching power supply is the basis of the seismic resilience assessment of the whole communication system.The seismic performance of a discrete switching power supply system commonly used in communication equipment buildings was investigated in this study through shaking table test.The characteristic damage mode,damage development process and the change of power supply function of the switching power supply were investigated during the test.In order to simulate the real working environment of the switching power supply,a 380 V voltage input and an analog electrical equipment are connected with the switching power supply.An artificial ground motion,a natural ground motion and a sine beat wave were selected as the excitation of the shaking table.The PGA of the shaking table gradually increased until the displacement of the table exceeded its limit,and the test was stopped.When the PGA reached 1.0 g,doors and main frames of the cabinets wore off the paint,indicating that cabinets began to be damaged.When PGA was in 1.2～1.5 g,the connection at the top of the power cabinet was loose,the panel connection screw was loose,and the bolt hole was punched.When PGA reached 2.0 g,the test stopped,the main frame of the power cabinet was not seriously damaged,and the front door axle of AC cabinet and DC cabinet were deformed.In addition,even under the larger PGA,the sine beat wave could not stimulate a large displacement and caused damage to the power cabinet.During the test,the electrical signal was always stable,and the seismic performance of the switch power cabinet was good.
switching power supply cabinetshaking table testseismic performancecommunication power supply equipmentoutput voltage accuracy
NETL
NSTL
万方数据
