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2000
Volume 18, Issue 7
  • ISSN: 2352-0965
  • E-ISSN: 2352-0973

Abstract

Introduction

This paper addresses the ongoing challenge of harmonics reduction in power systems, particularly focusing on Flexible AC Transmission Systems (FACTS) devices. Instead of employing a conventional multilevel converter, an alternative configuration is proposed: a 36-pulse gate turn-off thyristor-based converter (GTO-VSC). This converter comprises three 12-pulse Voltage Source Converters (VSCs) as fundamental units, operating collectively on the frequency mode of GTO switching control within a Distribution Static Synchronous Compensator (D-STATCOM). The D-STATCOM dynamically compensates reactive power in the system. The 36-pulse configuration results in AC output voltage waveforms containing harmonics such as the 35th, 37th, 71st, 73rd, ., leading to higher total harmonic distortion (THD) levels.

Methods

In response, the paper presents a new model featuring a 3-level, 36-pulse, 25kV, ±3MVAr STATCOM configured with 12-pulse GTO-VSCs. This model incorporates PWM gate switching and employs a PI-control methodology to optimize harmonics in simulation, specifically targeting harmonics at the 35th, 37th, 71st, 73rd, ., orders using Sim Power Systems toolbox in Math Works software.

Results

The compensator's operational performance is controlled through switching angle optimization, which minimizes harmonics, regulates voltage, and manages reactive power in the electrical transmission system.

Conclusion

The simulation results demonstrate that the proposed model is acceptable for enhancing the flexibility and performance of the FACTS device in mitigating harmonics in power systems.

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2024-04-03
2025-09-26

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The Implementation of Space Vector PWM in 36-Pulse D-STATCOM for Power Quality Improvement
Recent Advances in Electrical & Electronic Engineering 18, 938 (2025); https://doi.org/10.2174/0123520965277383240319041421
/content/journals/raeeng/10.2174/0123520965277383240319041421
/content/journals/raeeng/10.2174/0123520965277383240319041421
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  • Article Type:     Research Article
Keyword(s): D-STATCOM; FACTS device; GTO-VSC; simulation result; SVPWM; total harmonic distortion

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