Heater optimization operation connection system in steam turbine regenerative system

The utility model discloses a heater optimization operation connection system in a steam turbine regenerative system, relates to the technical field of steam turbines, and mainly aims to solve the problems that a regenerative system of a unit with the power of more than 300MW in summer is unreasonable and poor in operation economy. According to the main technical scheme, eight-stage regenerative steam extraction is carried out; the heater unit comprises a control valve, three high-pressure heaters, a deaerator, three low-pressure heaters and a standby heater, the first high-pressure heater, the second high-pressure heater, the third high-pressure heater, the deaerator, the first low-pressure heater, the control valve, the second low-pressure heater and the third low-pressure heater are sequentially connected in series, and the standby heater is connected with the control valve in parallel and is connected with the first low-pressure heater and the second low-pressure heater in series. The standby heater is a