High Performance Power Conditioning System Using Dynamic-Game-Theory-Based Variable Structure Controller
In this paper, a variable structure controller based on dynamic game theory is proposed to reduce the effects of parameter variations, and external disturbances caused by uncertain systems. The variable structure controller (VSC) is a popular method for tracking control, since it can offer robustness to parameter variations, and external disturbances. However, the chattering problem occurs. The chattering may cause the degraded system performance and poor tracking control. Thus, the dynamic game theory is applied in VSC, to quickly, and precisely enforce the system states to the sliding surface, thus reducing the chattering. The stability and the convergence of the overall system are confirmed by the Hamiltonian function. The control algorithm has been realized for the actual power conditioning system (PCS) controlled by a TMS320F2812 DSP. With this proposed controller, an example that the controlled PCS under nonlinear loads yields the better robustness in performance. Experimental results validate the theoretical analysis.