Application of DEH System by Using four DDV Valve Control

To the problem of non- stability of regulating speed system after Jingdezhen power Plant used DEH system to reform NO.134 unit, this paper analysed the cause of this problem, and gave out our proposal. At last we soluted the non- stability problem of regulating speed system, applied the DEH system which used four DDV valves to control the 125MW turbine unit successfully.