Journal of Electrical Power System Engineering and Technology ISSN: 3107-8532 (Online)

Authors: Dimple Ahuja, Rajeev Dutta, Mayank Josh

Abstract: The power quality (PQ) within distribution systems can be compromised by customer-induced pollution, leading to issues like voltage sag, particularly exacerbated by nonlinear loads. Voltage dips stemming from these loads can pose critical challenges to system stability. To address such concerns, this study introduces a novel solution: a DSTATCOM (Distribution Static Compensator) employing a Cascaded H-bridge (CHB) Inverter. CHB converters are gaining popularity due to their capacity for high power, minimal output harmonics, and reduced commutation losses. The proposed design incorporates a standard three-leg inverter, with each phase augmented by an H-bridge utilizing a capacitor as the DC power source. Verification of the DSTATCOM's efficacy is achieved through MATLAB simulation, leveraging its Simulink and Power System Blockset tools. Comparative analysis of system performance, both with and without the DSTATCOM, underscores its effectiveness in mitigating voltage sag within the power distribution network.

Keywords: Power Quality; DSTATCOM; Restructured Power Systems; Reactive Power Compensation