Analysis of Key Factors Influencing Frequency Security in Power System Operation Mode

As the penetration rate of renewable energy units and power electronic equipment continues to increase, the power system has undergone significant transformations, exhibiting “double high” characteristics. In this new power system, the operation mode experiences profound and intricate changes, leading to prominent issues concerning frequency security. However, existing studies on frequency dynamics rarely take the influence of operation mode into account. The operation mode changes frequently in the new power system, it becomes crucial to analyze its impact on frequency. Therefore, this paper proposes a sample generation process for operation mode based on the analysis of key factors such as unit commitment, load level and load distribution, which can provide data basis for subsequent analysis. Firstly, the key factors that influence frequency security are analyzed. Subsequently, a sample generation process using Python and PSD-BPA co-simulation is proposed to provide data for evaluating the impact of operation mode on frequency security. Finally, the influence of unit commitment, load level and load distribution on frequency security are analyzed through case study. The results of case study demonstrate unit commitment and load level are the key factors influencing frequency security.