Cold-state quick starting system for low-pressure combined cylinder unit in combined cycle unit

The invention discloses a cold-state quick starting system for a low-pressure combined cylinder unit in a combined cycle unit, and relates to the field of generator sets. Comprising a gas turbine and a main steam turbine, the gas turbine and the main steam turbine are connected in parallel and connected to a generator through an opening and closing device, the main steam turbine is connected with a steam heat supply device through a pipeline, the steam heat supply device is a boiler or an auxiliary steam turbine in a running state, and the main steam turbine is composed of a medium-low pressure cylinder and a high pressure cylinder. A first bearing, a second bearing, a third bearing, a fourth bearing and a fifth bearing are arranged on a connecting shaft system of the medium-low pressure cylinder, the high pressure cylinder and the generator respectively, and the first bearing is arranged on the side, away from the high pressure cylinder, of the medium-low pressure cylinder. According to the method, the cold-