Power Quality Improvement of Hybrid System in Grid and Islanded Mode of Operation Using DSTATCOM BESS

Abstract

Electrical energy generation from renewable energy sources is increasing on a day-to-day basis due to the massive increase in global warming as a result of the extensive use of conventional fuel-based energy sources. However, these renewable sources are much dependent on atmospheric conditions, and depending solely on such sources for power generation can be the cause of system-wide disturbances in power networks. These integrated intermittent renewable sources also add various power quality issues to the entire grid due to their nonlinear nature. However recent advancements in power electronics offer many practical benefits that can regulate this discontinuous behavior of renewable systems, especially that of Solar and Wind. In this paper, such power quality improvement technique for Wind-Solar coupled systems is studied in grid-connected and islanded modes of operations. This paper focuses on voltage regulation, Harmonic distortion, and frequency imbalance nature of the power network in the presence of solar and wind sources. The proposed scheme consists of a most advanced type of power electronic compensator namely Distribution Static Compensator (DSTATCOM) energized with Battery Energy Storage System (BESS). The proposed system is applied and simulated in MATLAB/Simulink software. The results attained from this proposed method indicate that DSTATCOM performs efficiently to enforce grid coordination rules in grid-connected and islanded modes according to IEEE standards.