基于分频和自适应死区控制的火电机组一次调频策略.

With the large-scale grid connection of new energy, the frequency stability of power system is facing great challenges. Due to the larger inertia of thermal power units, the potential of primary frequency modulation can be deeply explored. The feedback signal of primary frequency modulation system was decomposed by frequency division device to obtain signals of different frequency bands, and appropriate frequency dead band interval was set for signals of different frequency bands, so that the thermal power units can be controlled and adjusted by frequency division, thus improving and improving the primary frequency modulation performance of thermal power units. In order to study the influence of unit frequency division control on the primary frequency modulation capability of the system, the primary frequency modulation model of the power system was built in the simulation software. The simulation results under different working conditions show that the frequency division control can effectively improve the system frequency modulation performance. In addition, the coordinated control system model of the boiler was also introduced. Through the analysis of the main steam pressure of the boiler, it is verified that this strategy not only strengthens the primary frequency regulation ability of the unit, but also improves the stability of the unit. [ABSTRACT FROM AUTHOR]