The invention provides a starting method of non-starting steam after
tripping of a power generating set of a thermal power
plant. The starting method comprises the following steps that after the powergenerating set is tripped, a boiler starts to quickly purge; a low-pressure bypass electric door on an inlet pipeline of a steam exhaust device is closed, and a high-pressure bypass electric door connected to a pipeline between a boiler
superheater outlet and a boiler reheater inlet is opened, so that a reheating cold section is connected to a
steam turbine shaft seal steam source, the normal steam supply of the shaft seal is maintained to be not interrupted, and the
steam turbine is prevented from entering the cold steam cold water; the situation that the generating set trips due to the factthat a boiler main device is damaged is confirmed, a plurality of oil guns are put into for heating and boosting; when all the oil guns are normally combusted, a
coal mill is started for heating andboosting; when a starting parameter of the generating set meets the condition that a preset extreme-heat-state
punching parameter is met,
steam turbine punching is carried out immediately; and
grid connection with loads is carried out. According to the method, the steam-free starting under the thermal condition of the power
plant can be realized without establishing a starting boiler and without being connected to the
peripheral power plants.