Analysis and Treatment of the Excessive Starting Current of the Nuclear Grade DC Valve Electric Actuator
The nuclear grade DC and UPS systems of nuclear power plants provide power to the safety related equipment.The matching of the power supply and the distribution design with load selection is related to the safe operation of nuclear power plants.The starting current of the DC electric actuator exceeds the design value,which could lead to a voltage drop in the power supply circuit which is higher than permitted,resulting in the valve not being able to open and close correctly,and affecting nuclear safety functions.This paper analyzes the impact and causes of the problem of the starting current of the DC valve electric actuator exceeding the design value discovered during the commissioning of a nuclear power plant.Rectification measures are proposed and verified.
DC systemelectric actuatorstarting currentcorrective action
NETL
NSTL
万方数据
