The energy saving optimization of condensate pump is very critical to improve the economy operation of thermal power unit under the condition of deep peak load regulation. In this study

the condense pumps of the 330 MW heating unit arranged with "one machine two pumps" and "one machine one pump" are selected as the research object respectively. The Ebsilon software is used to model and simulate the operating conditions of the unit under normal operation and deep peak load regulation conditions. The flow characteristics and power consumption characteristics of the condensate pump are analyzed. And an energy saving optimization scheme for adding a small flow condensate pump is proposed

the economy and feasibility of this scheme are demonstrated. The results show that

under the condition of deep peak load regulation

the original condensate pump and auxiliary motor system have low efficiency and large power consumption

which affects the safe and economic operation of the unit. The average power consumption of adding a small flow condensate pump is less than that of the original condensate pump

which is economically feasible and practical.