This paper presents a novel power system stabilizer based on terminal sliding mode control. Speed deviation and electrical power are selected as controller inputs. The sliding surface is reached in finite time, after that, the states slide on the surface and reach the equilibrium point in finite time. On the sliding manifold, the dynamic of the system is governed by the form of the surface and not by the dynamic of the system, so, the matched uncertainties and unmodelled dynamics can be cancelled. The robustness of the proposed method is verified on a single-machine infinite bus (SMIB). A comparative simulation study is presented to evaluate achieved performance enhancements showing better oscillations damping and faster transient dynamic behavior over two considered controllers: a conventional that means a lead lag compensator, and a classical sliding mode power system stabilizer.

Keywords: Single-machine infinite bus (SMIB), Electricity spot market, Terminal sliding mode control, Stability, Synchronous machine, Infinite bus (IB)