This article discusses the key aspects of setting the parameters of automatic regulators that are used in process control systems, in particular at nuclear power plants (NPP). The need for fine-tuning regulators is emphasized to ensure the stability, efficiency and safety of the systems. Traditional tuning methods such as the Ziegler-Nichols method and frequency analysis are described, which, despite their reliability, require significant time and an accurate mathematical model of the control object. In modern production conditions, where efficiency is important, express methods are relevant to reduce setup time, but their accuracy and versatility remain questionable. Special attention is paid to the problems that arise when using real regulators, such as integral saturation and periodic invocation of the control algorithm. Integral saturation can lead to a deterioration in the dynamic characteristics of the system and even to the activation of technological protections, and an incorrect choice of the period for calling the regulator can cause a loss of stability of the system. Methods A method for tuning PI controllers is proposed that takes into account the dynamic characteristics of control objects and the results of experimental studies. Recommendations are given on the choice of proportionality coefficients and the integration time constant, which make it possible to achieve an aperiodic transition process, minimize the risk of saturation and ensure high quality control. Results The results of experiments conducted on the UMICON software and hardware complex confirmed the effectiveness of the proposed approach. Conclusion. The developed rules for rapid evaluation of regulator parameters make it possible to simplify the setup process, reduce setup time, and improve the reliability of automatic control systems at nuclear power plants. This is especially important to ensure the safety and stability of such critical facilities as nuclear power plants.
