Fast Load Frequency Control for Power System Based on Fixed-Time Dynamic Surface Method

The inherent fluctuations of high penetrated renewables energy sources in power system results in larger and more sharp frequency deviation, which call for faster frequency response and fast load frequency control (LFC). This paper innovatively envisions LFC in power system with fixed-time dynamic surface method. Firstly, the virtual control law is designed through backstepping design to ensure the asymptotic stability of each subsystem. Additionally, dynamic surface control (DSC) is adopted to eliminate the influence by adding a first-order filter in the backstepping design. By using the fixed-time theory, the frequency of the LFC for power system reaches stability in a predetermined time. Finally, the simulation of the power system proves the effectiveness of the proposed method.