Abstract
The application of a distribution static synchronous compensator (D-STATCOM) is the best technical means to solve the problem of reactive power compensation and harmonics. The D-STATCOM system has the characteristics of variable parameters, strong coupling, nonlinearity and multi-variability. In order to improve the speed of the dynamic tracking response and anti-disturbance capability of the D-STATCOM, the article proposes an improved Linear Active Disturbance Rejection Controller (LADRC) based on the total disturbance deviation control method. Combined with double closed-loop control, the inner loop takes the current as the state variable, and the outer loop uses the DC side output voltage as the state variable to achieve robust stability of the D-STATCOM and controller output. The simulation results show that the improved LADRC is more stable than the traditional LADRC in controlling the DC voltage waveform of the compensator, reactive current tracking and reactive power compensation waveform when it is disturbed, which verifies the superiority and feasibility of the improved LADRC.
Highlights
A distribution static synchronous compensator (D-STATCOM) is a kind of parallel device for reactive power compensation, which is mainly used in low-voltage distribution networks [1]
The second part introduces the mathematical model of the D-STATCOM, and in the third part, the methods of improving the Linear Active Disturbance Rejection Controller (LADRC) are proposed by deeply studying the connotations of the traditional first-order LADRC and second-order LESO
In order to verify the effectiveness of the improved LADRC strategy described in this article, article builds on the D-STATCOM simulation model shown in Figure 1 based on MATLAB and the article builds on the D-STATCOM simulation model shown in Figure 1 based on MATLAB and Simulink simulation software
Summary
A distribution static synchronous compensator (D-STATCOM) is a kind of parallel device for reactive power compensation, which is mainly used in low-voltage distribution networks [1]. The improved Linear Active Disturbance Rejection technology is implemented to control the D-STATCOM system and the proposed control strategy is simulated and analyzed. The second part introduces the mathematical model of the D-STATCOM, and in the third part, the methods of improving the LADRC are proposed by deeply studying the connotations of the traditional first-order LADRC and second-order LESO. As well as the anti-disturbance characteristics of the improved LADRC combined with the actual D-STATCOM system, the Lynard–Chiapart principle is used to prove the stability of the controller.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
