Damai Lendra Boy Rendika, Suherman, Syafruddin Hasan

The Use of Active Filter to Mitigate Harmonics in Cryptocurrency Mining Computer

Introduction

The use of active filter to mitigate harmonics in cryptocurrency mining computer. Mitigate harmonics in cryptocurrency mining PCs with active filters. Achieve significant THDi reduction and power factor improvement, boosting power quality, energy efficiency, and grid stability.

Abstract

Cryptocurrency mining computers act as non-linear loads, introducing significant harmonic distortions that degrade power quality and system efficiency. This study explores the use of a shunt active filter with an inductance of 0.0075 H to reduce harmonics in a high-load cryptocurrency mining rig. Harmonic measurements were collected using a Fluke 43 Power Quality Analyzer and validated through MATLAB/Simulink simulations. Results revealed a substantial reduction in Total Harmonic Distortion in Current (THDi) from 76.62% to 9.18%, achieving compliance with IEEE 519-2014 standards. Additionally, major harmonic orders—specifically the 3rd, 5th, and 7th—were each suppressed by more than 90%. The system’s power factor improved markedly from 0.85 to 0.99, indicating enhanced energy efficiency. These outcomes demonstrate the effectiveness of active filters in improving power quality in cryptocurrency mining operations and suggest their practical application in industrial-scale setups to minimize energy losses, extend hardware lifespan, and support grid stability.

Review

The paper titled "The Use of Active Filter to Mitigate Harmonics in Cryptocurrency Mining Computer" addresses a highly relevant and growing concern in modern power systems: harmonic distortion generated by non-linear loads, specifically cryptocurrency mining rigs. The authors effectively demonstrate the application of a shunt active filter as a robust solution to these power quality issues. The study makes a valuable contribution by providing a clear and quantifiable assessment of active filter performance in a practical, high-load scenario, which is crucial given the increasing prevalence and impact of such operations on electrical grids. A significant strength of this work lies in its direct applicability and the comprehensive validation approach. The methodology combines real-world harmonic measurements using a Fluke 43 Power Quality Analyzer with complementary MATLAB/Simulink simulations, thereby enhancing the credibility and reliability of the findings. The reported results are exceptionally strong and quantitatively compelling: a dramatic reduction in Total Harmonic Distortion in Current (THDi) from a severe 76.62% down to an impressive 9.18%, successfully achieving compliance with the IEEE 519-2014 standards. Furthermore, the specific suppression of the 3rd, 5th, and 7th major harmonic orders by over 90% and the marked improvement in power factor from 0.85 to 0.99 underscore the active filter's effectiveness in enhancing both power quality and system efficiency. The implications of this research are substantial, particularly for the expanding cryptocurrency mining industry and the broader electrical grid. The demonstrated efficacy of active filters in improving power quality, reducing energy losses, and potentially extending hardware lifespan provides a strong practical argument for their adoption in industrial-scale setups. While the abstract clearly outlines the positive outcomes, future investigations could explore the economic feasibility and return on investment for large-scale deployment, the active filter's performance under highly dynamic load changes, or comparative studies with other harmonic mitigation techniques. Nevertheless, this study convincingly establishes active filters as an essential technology for managing power quality challenges posed by cryptocurrency mining, offering a significant step towards more stable and efficient power systems.

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