Voltage control strategy of D-STATCOM based on Fuzzy-PI controller

The voltage control strategy of distribution static synchronous compensator (D-STATCOM) based on Fuzzy-PI Controller is presented in this paper. The characteristics of mathematic model of D-STATCOM is investigated.The paper points out that the traditional PI control can not fit for the control system of D-STATCOM. In the traditional cascade control strategy it is very difficulty to tuning the PI regulator parameter and it has not the adaptive performance. In order to improve the control performance of D-STATCOM control system, the direct voltage control strategy based on the balance of instantaneous power combined with PI control method based on self-tuning parameter is proposed. The simplicity, excellent performance and practiclity are verified by experimental results.