Four strategies for improving the flexibility of coal-fired units are introduced in detail

which are coordinated control frequency modulation(FM) based on advanced control technology

throttle frequency modulation in condensate water

short-term FM of heating unit

and FM in condenser's back pressure. Combined with the actual work

the condensation water throttle fast load technology is integrated with the original coordinated control of a power plant. After the project is implemented

the whole system runs steadily. The unit load can quickly respond to the change of AGC instruction

only the condensation water throttling can increase the load regulation rate by 1.6%Pe/min

and AGC adjustment dead zone can be quickly stepped out within 25 s

the regulation performance is good. According to the calculation

the comprehensive index of the average adjustment performance of the unit has been improved by about 10%

the coal consumption is reduced by about 0.93 g/(kW·h)

and the economy and peak regulating capacity of the unit are further improved.