The Excitation Controller of Synchronous Generator Employing PID and Fuzzy Integrated Algorithm Based on S3C2410A

Abstract

A new kind of excitation controller of harmonic wave excited synchronous generator is proposed in this paper. The controller can adjust the excitation current by adjusting duty circle of the PWM wave, in order to keep the terminal voltage at the expectation value. To solve the problems existing in the conventional PID algorithm, the duty circle of the PWM wave is calculated by PID and fuzzy integrated algorithm which can employ different control algorithm to adapt to the different case. In addition, the S3C2410A with ARM920T CPU core has been used as CPU of the controller, which makes the controller finish the complex algorithm in time. So the high speed and real-time performance can be guaranteed. The simulation result shows the controller with PID-FUZZY composite algorithm is better than traditional PID controller both in speediness and in stability. Whatpsilas more important, the controller can be adapted to the different generators without change the parameters as the controller with traditional PID algorithm. In addition, the experiment on the W6-90 KW harmonic excitation generator has shown the generator with excitation controller designed in this paper can running steadily, and its various parameters performances can reach the national standards.