核电厂柴油发电机需要具备起动速度快、有功功率大、供电时间长、可靠性高、带载性能好等特点，而机组的调速系统作为机组的核心控制部件，对机组的稳定可靠运行起着至关重要的作用。为解决柴油发电机在外电网运行状况波动时传统调速控制方法引起的低频振荡等问题，提出了一种基于电力系统稳定器（PSS）和模糊PID控制的柴油发电机调速方法。基于MATLAB Simulink仿真软件搭建柴油发电机调速系统模型，将实际工程运行数据与基于PSS和PID的转速控制方法进行仿真对比。结果表明该方法具有较高的适应性和鲁棒性，不仅提高了柴油机转速的控制精度，还加强了端电压与功率的稳定。

Nuclear power plant diesel generators need to have the characteristics of fast start-up speed, large active power, long power supply time, high reliability, good load performance, and so on. As the core control component of the unit, the speed regulation system plays a crucial role in the stable and reliable operation of the unit. The low frequency oscillation exists in the traditional speed regulation control method for diesel generators with external power network fluctuation. To solve the problem, a kind of speed regulation method for diesel generators based on power system stabilizer (PSS) and fuzzy PID control is proposed. The diesel generator speed control system model is built based on MATLAB Simulink simulation software. The simulation results show that the proposed method has high adaptability and robustness, which not only improves the control precision of diesel engine speed, but also speeds up the stability of terminal voltage and power.