The mode of start-up via I.P. cylinder not only can meet the requirments to rise temperature of large steam flow in the bypass system and shorten the start-up time

but also enable the H.P. and I.P. cylinders to be heated uniformly

having reasonable temperature rise and making cylinders easy to expanse out

hence the safty and economy of start-up can be integrally enhanced. For digital electro-hydraulic system or simple electro-hydraulic system

this mode of start-up can be realized without any difficulty

but for hydraulic regulating unit

it is difficulty to realize this mode of start-up without undergoing retrofit. The features of hydraulic regulating system for realizing start-up of Russia made K-300-170-3 type unit via I.P. Cylinder described here can be used for reference to realize start-up of units via I.P. cylinder by adopting hydraulic regulating system.