Research on Cooperative Control Method for Tie-Line Power Fluctuation in Interconnected Power Grids Based on LQR

The integration of high-penetration renewable energy exacerbates tie-line power fluctuations in interconnected power grids. Traditional control methods suffer from poor real-time performance and insufficient regulation accuracy. This paper proposes a cooperative control method based on Linear Quadratic Regulator (LQR). By integrating thermal power unit regulation, dynamic response of electrolytic aluminum loads, and wind power disturbance characteristics, a multivariate state-space model is established. This method provides a high-precision, low-latency solution for the economic operation of high-energy-cons'uming industrial grids and the security and stability of large-scale power systems, demonstrating significant engineering application value.