Analysis and Optimization of DC Control Parameter Coupling Characteristics in Interconnected Emerging Power Systems

The DC project isolates the AC fault propagation and weakens the power mutual support between regional grids. Meanwhile, the frequency fluctuations caused by larger power imbalance events in regional grids are more significant. To solve the above problems, this paper adopts the measure of optimizing key control parameters. Firstly, correlation analysis is conducted on the frequency limit control (FLC) parameters that need to be tuned and qualitatively analyzes the coupling effects between various control parameters under the same indicator. Secondly, according to the results of the coupling correlation analysis, the objective function under the constraints of the DC regional grid is proposed to be taken into account. Finally, an intelligent optimization algorithm is selected to find the optimal for the objective function and constraints, and Python is used to call BPA to tune the parameters of FLC.