A Least Square Reduced-Order Analysis and Risk Assessment of Frequency Regulation in Renewable Generation System

In view of the lack of universality and accuracy in the quantitative analysis of renewable power system frequency based on the traditional system aggregation equivalence method, this paper proposes a quantitative analysis method of system frequency based on parameter optimization which considers the common effect of traditional generator units and renewable energy units in the process of frequency regulation. On this basis, the frequency quantitative analysis and risk assessment of the disturbed system are carried out. An example is constructed in PSCAD/EMTDC to verify the rationality and correctness of the proposed equivalent model and risk assessment method.