Abstract:

In the high back pressure heating reformation of No.2 unit in Huadian Qingdao Power Generation Company Limited, a control mode for feed water pump turbine is taken, in which high pressure regulating valve is used to control the prepressure of low pressure regulating valve, and low pressure regulating valve is used to control rotation ratio. The key technology of the high pressure regulating valve control reformation of the micro electrohydraulic control system (MEH) is introduced, and the operating condition after the transformation is tested and analyzed. The good results after the transformation prove the rationality and effectiveness of the transformation.

Key words:

high back pressure, heating reformation, feed water pump turbine, high pressure regulating valve, low pressure regulating valve, pressure