METHOD AND SYSTEM OF AUTOMATIC REGULATION OF THE CCGT UNIT WITH FORCING IMPACT ON THE CONTROL VALVES OF HIGH AND MEDIUM PRESSURE OF THE STEAM TURBINE Russian patent published in 2018 - IPC F01K13/00 

FIELD: power engineering.

SUBSTANCE: invention relates to power engineering. Method and system for automatic power control (SAPC) of a combined cycle gas turbine unit (CCGT), including at least one gas turbine unit (GTU), corresponding number of waste-heat boilers (WB) connected to their gas exhausts and in parallel a steam-turbine installation (STI) connected to the last in a couple. When the frequency of the electrical network deviates from the nominal value, the power change reference signal is distributed to the control systems of the CCGT and steam turbine, and in the steam turbine control system, the corresponding reference signal is passed through the boost elements. Specified reference signal of the steam turbine control system is additionally distributed to the reference signals of the control of high and medium pressure valves of the specified steam turbine. On the cover of these valves restrictions are set, and the movement of the regulating bodies of the medium pressure valves towards their cover is carried out upon reaching a predetermined threshold level of deviation from the nominal value of the electrical frequency of the network, which requires the highest possible speed of the control system.

EFFECT: invention allows to increase the speed and accuracy of power control, as well as the efficiency of the CCGT in maneuverable modes of its operation.

2 cl, 4 dwg