Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) - Online First

In grid-connected operation control, the Brushless Doubly-Fed Reluctance Generator (BDFRG) faces issues with strong parameter coupling and weak disturbance rejection.

This paper proposes a direct power control strategy with a novel integral sliding mode controller. By analyzing the correlation between the voltages on the stator control winding side and the active/reactive power, a direct power control model is derived from the d-q rotating coordinate system, achieving decoupling control of active and reactive power. An integral sliding surface, along with a smoothing function, is introduced to improve the switching behavior as the system approaches the sliding surface. Stability ranges for the parameters Kd and Kq are determined by constructing a Lyapunov function.

Results from simulations and hardware-in-the-loop (HIL) experiments demonstrate that the direct power control strategy with a novel integral sliding mode controller reduces chattering and improves the static and dynamic performance of the system, compared to conventional sliding mode control strategy.

The proposed direct power control strategy not only addresses the chattering issues during sliding mode switching but also ensures system stability and efficiency through optimized parameter adjustment.