The frequency converter of condensate pump is widely used in power plants

and the control strategy is commonly designed as"the deaerator level controlled by the valve

and the condensate water pressure controlled by the frequency converter"or"level controlled by converter

and pressure controlled by valve".However

both of the control strategies have flaws.Thus

the "level controlled by value

with pressure controlled by converter"control logic was optimized

and then applied in Huaneng Shidongkou Second Power Plant units.The results show that

the optimized control logic effectively improves the safety and economics of the frequency converter.