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A three-phase transformer based T-type topology for DSTATCOM application
International Journal of Electronics ( IF 1.3 ) Pub Date : 2021-02-09 , DOI: 10.1080/00207217.2020.1870733
Hari Priya Vemuganti 1 , Dharmavarapu Sreenivasarao 2 , Ganjikunta Siva Kumar 2
Affiliation  

ABSTRACT

Among the various reduced switch count multilevel inverter (RSC-MLI) topologies, T-type is the simplified configuration with appreciable reduction in switch count and, posses an ability to serve an alternative to cascaded H-bridge (CHB) MLI. However, extreme reduction in switch count of T-type topology has limited its switching redundancies and created critical dc-link voltage balancing issues in closed-loop applications. In addition, conventional multi-reference PWM scheme reported for T-type produces poor line-voltage total harmonic distortion (THD). Therefore, in this paper, a five-level T-type topology is presented, which involves only one-third dc source requirement of conventional T-type and CHB. This will greatly reduce the dc-link voltage balancing issues and cost. Further, to improve the harmonic performance of conventional multi-reference PWM, a simple carrier-based modulation scheme is proposed. The open and closed performance on the proposed scheme is validated on Simulink and experimental environment considering five-level T-type configuration. To evaluate the dynamic performance of developed T-type configuration, a three-phase three-wire (3P3W) distributed static compensator (DSTATCOM) application is considered, where its ability to eliminate source current harmonics, reactive power and load unbalance is investigated. To promote the superiority of the developed T-type topology, its cost comparison with conventional T-type and CHB is presented.



中文翻译:

用于 DSTATCOM 应用的基于三相变压器的 T 型拓扑

摘要

在各种减少开关数量的多电平逆变器 (RSC-MLI) 拓扑中,T 型是开关数量显着减少的简化配置,并且能够替代级联 H 桥 (CHB) MLI。然而,T 型拓扑开关数量的大幅减少限制了其开关冗余,并在闭环应用中产生了关键的直流链路电压平衡问题。此外,针对 T 型报告的传统多参考 PWM 方案会产生较差的线电压总谐波失真 (THD)。因此,在本文中,提出了一种五电平 T 型拓扑,它只涉及传统 T 型和 CHB 直流电源要求的三分之一。这将大大减少直流链路电压平衡问题和成本。更远,为了改善传统多参考PWM的谐波性能,提出了一种简单的基于载波的调制方案。在考虑五级 T 型配置的 Simulink 和实验环境上验证了所提出方案的开放和封闭性能。为了评估开发的 T 型配置的动态性能,考虑了三相三线 (3P3W) 分布式静态补偿器 (DSTATCOM) 应用,研究了其消除源电流谐波、无功功率和负载不平衡的能力。为了提升所开发的 T 型拓扑的优越性,介绍了其与传统 T 型和 CHB 的成本比较。在考虑五级 T 型配置的 Simulink 和实验环境上验证了所提出方案的开放和封闭性能。为了评估开发的 T 型配置的动态性能,考虑了三相三线 (3P3W) 分布式静态补偿器 (DSTATCOM) 应用,研究了其消除源电流谐波、无功功率和负载不平衡的能力。为了提升所开发的 T 型拓扑的优越性,介绍了其与传统 T 型和 CHB 的成本比较。在考虑五级 T 型配置的 Simulink 和实验环境上验证了所提出方案的开放和封闭性能。为了评估开发的 T 型配置的动态性能,考虑了三相三线 (3P3W) 分布式静态补偿器 (DSTATCOM) 应用,研究了其消除源电流谐波、无功功率和负载不平衡的能力。为了提升所开发的 T 型拓扑的优越性,介绍了其与传统 T 型和 CHB 的成本比较。研究了无功功率和负载不平衡。为了提升所开发的 T 型拓扑的优越性,介绍了其与传统 T 型和 CHB 的成本比较。研究了无功功率和负载不平衡。为了提升所开发的 T 型拓扑的优越性,介绍了其与传统 T 型和 CHB 的成本比较。

更新日期:2021-02-09
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