ＤＥＨ系统中阀位传感器的故障会给阀门管理带来混乱，特别在调节级压力回路未投入的情况下会引起汽机功率的较大变化。本文基于解析冗余原理，提出用信号重构的方法来实现单个阀位传感器故障下的容错阀门管理。仿真结果表明此方法简单而有效。 Failure of the valve position sensor in the DEH system can cause confusion to the valve management, especially in the case where the regulator pressure circuit is not put into operation, which causes large changes in the turbine power. In this paper, based on the principle of resolving redundancy, a method of signal reconstruction is proposed to realize the fault-tolerant valve management under single valve position sensor fault. Simulation results show that this method is simple and effective.