A fuzzy self-tuning PID control system of adjustable speed diesel generator

In order to improve the quality of power supplied by medium and small-sized diesel generator which was applied an islanded load, a digital electronic speed control system was designed in this paper. For adapting the broad load characteristics, the structure of Variable-Speed-Integrated-Generator (VSIG) was adopted by the diesel generating set. The proposed governor used a fuzzy self-tuning proportion-integral-derivative structure controller that can provide variable gain strategies to account for nonlinearities in the system. The results of test were obtained by a 3kW naturally aspirated diesel generator which was applied islanded load. The test results showed that the system designed had integrated functions of speed regulating and good speed characteristics.