Integrated tuning of PID-derivative load frequency controller for two area interconnected system
PID-derivative filter has been considered better than the normal PID control when it comes for the stability analysis of a power system. This paper presents a PID-derivative filter load frequency controller for the two thermal-thermal and hydrothermal interconnected areas. The proposed controller has been based on cascading of derivative filter with PID controller. The Ziegler- Nichols (Z-N) tuning method has been used for tuning the controllers. Results of the proposed derivative controller have been compared with conventional proportional integral derivative controller in time domain analysis. A remarkable improvement in stability of the system has been observed with PID-derivative filter controller justifying its applicability. Simulated results given in the paper show the feasibility of the proposed PID-derivative filter controller.
Keywords: controller; derivative filter; tie line; two area