After implementation of frequency conversion retrofit for condensate pumps of 330 MW untis in the third-phase poject of Guodian Heze Power Plant

in order to further reduce the pressure loss in the condensate pipeline

the main and auxiliary regulating valves for water-level in the deaerator as well as its bypass motor-operated valve are fully opened during normal operation of units.For satisfying the requirement of sealing water pressure in the turbine-driven feed-water pump

the sealing water bypass valve of turbine-driven feed-water pump has to be properly opened.At the same time

the control logic of condensate system has been optimized.After optimization

the effectivenes of electricity-saving is remarkable under operation mode of frequency conversion

the safety of units has been further enhanced.