Real-time implementation of an adaptive nonlinear control for synchronous machines

In this paper we focus our attention on the new controller where the system is driven to the new equilibrium point as the adaptation runs, and try to assure better than just asymptotical stability. A real-time implementation of an adaptive nonlinear controller is investigated. The experimental setup of this power system includes a DC motor and synchronous machine connected to a large power system through a transmission line. Note that, major objectives in power system control design are to prevent an electric power system losing synchronism after a large sudden fault and to achieve a good post-fault regulation of the generator terminal voltage. In fact, the feedback control proposed here is assumed to achieve transient stabilization and voltage regulation when large and sudden faults occur to the transmission line, or to the DC motor, so that the mechanical power may permanently take any value within its physical bounds. The efficiency of the proposed controller has been verified via experimental results and compared to the performance of the standard linear controllers such as the automatic voltage regulator (AVR) and power stabilizer (PSS). Results of the experimental studies demonstrate the effectiveness of this nonlinear adaptive controller.