Abstract:

In a digital electrohydraulic control system(DEH) of a power plant’s #1 unit, there had been many faults on linear variable differential transformer(LVDT) and valve position (VP) jamming before the upgrading of LVDT and VP. It puts forward the scheme and practical procedure of a redundancy making and upgrading transformation. After the redundancy making and upgrading transformation, safety and stable operation coefficient of steam turbine is increased.

Key words:

digital electrohydraulic control system, linear variable differential transformer, valve position jamming, redundancy