Treffer: Control of DSTATCOM using reduced order-based adaptive observer under grid supply with optimized PI gains.

An adaptive observer with a decreased order is proposed in this study for use in the hardware implementation of a 3-p, 3-w distribution static compensator (DSTATCOM), which extracts grid parameters. The DSTATCOM is inculcated for attaining various functions like reactive power compensation, mitigation of current source related harmonics accompanied by the self-sufficient DC bus. A reduced order-based adaptive observer is incorporated to determine grid parameters which work under the polluted condition and does not depend on the linearization of PD output using PLL. A Lyapunov function is incorporated for ensuring the proper tracking of grid parameters under the distorted conditions which makes the system adaptive. In order to achieve the fine tuning of proportional integral gains which preserves the DC bus voltage to its craved value, Gray Wolf Optimizer is employed which utilizes very less memory and requires very less parameters reducing the computation time offering faster response in achieving the values with lower settling and rise time in comparison with manual method. Simulation in MATLAB and hardware prototyping in the laboratory with the aid of a digital signal processor are used to evaluate the control algorithm's performance, with the findings validating the control algorithm's performance. [ABSTRACT FROM AUTHOR]