Control Strategy Research of D-STATCOM Using Active Disturbance Rejection Control Based on Total Disturbance Error Compensation

The distribution static synchronous compensator (D-STATCOM) has the characteristics of non-linearity, multivariable and strong coupling. Based on analysis D-STATCOM mathematical model, in order to improve performance linear active disturbance rejection controller (LADRC), solve coupling problem between d-axis q-axis current dynamic tracking response speed anti-interference ability. A with LADRC that compensates error total is proposed, stability improved first-order proved by Lyapunov theory. Then output full interference channel corrected ability system observation extended state observer (LESO) high-frequency noise. Through Bode diagram frequency domain, compared traditional LADRC, proposed this paper better performance. Finally, used replace control strategy for inner loop control, which effectively reduces LESO. experimental results show than proportional integral (PI) controller, it