基于分频和自适应死区控制的火电机组一次调频策略

随着大规模的新能源并网，电力系统的频率稳定问题面临着巨大挑战。由于火电机组惯量更大，可以深度挖掘其一次调频的潜力，本文通过分频装置对一次调频系统的反馈信号进行分解得到不同频段的信号，对不同频段信号设置适当的频率死区区间，从而能够分频段对火电机组进行控制调节，进而改善提升火电机组的一次调频性能。为了研究机组分频控制对系统一次调频能力的影响，在仿真软件中搭建电力系统一次调频模型，在不同工作环境状况下的仿真结果表明分频控制能够有效地改善系统调频性能。，此外还引入了锅炉的协调控制系统模型，通过对锅炉主蒸汽压力的研究分析，验证了该策略在加强机组一次调频能力的同时，也提高了机组的稳定性。

Primary Frequency Regulation Strategy for Thermal Power Units Based on Frequency Division and Adaptive Deadband Control

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. In this paper, the feedback signal of primary frequency modulation system is decomposed by frequency division device to obtain signals of different frequency bands, and appropriate frequency dead band interval is 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 is 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 is also introduced. Through the research and 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.