Simulation study on circulating water system of 300 mw steam turbine unit

Circulating water pump is one of the auxiliary equipment with large power consumption in the power plant, and its power consumption accounts for about 10% ~ 25% of the power consumption of the plant. A power plant added the #1 and #3 circulating jellyfish tube contact doors and implemented the two-speed transformation of the circulating pump motor, which not only increased the flexibility and economy of the circulating water system regulation but also increased the complexity and blindness of the circulating water system regulation. The simulation calculation and field test show that the relationship between the total inlet flow of the condenser and the total power consumption of the circulating pump is linear and the trend is similar under different numbers of units and different numbers of circulating pumps.