Analysis on Three-phase Voltage Sag Isolation Capability of Cascaded Power Electronic Transformer

Shaobo XU; Jiamin CHEN; Yonghai XU; Xueyin ZHANG; Yunbo LONG; Zhanfeng DENG

doi:10.7500/AEPS20190126005

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Analysis on Three-phase Voltage Sag Isolation Capability of Cascaded Power Electronic Transformer

Application Research | 更新时间：2025-06-16

- Analysis on Three-phase Voltage Sag Isolation Capability of Cascaded Power Electronic Transformer
- Automation of Electric Power Systems Vol. 44, Issue 4, Pages: 168-177(2020)
- 作者机构：
  
  1. 新能源电力系统国家重点实验室(华北电力大学),北京市 102206
  2. 先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市 102209
- 作者简介：
- 基金信息：
  
  Beijing Natural Science Foundation;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- DOI：10.7500/AEPS20190126005
  CLC：
- Received：26 January 2019，
  
  Revised：2019-06-03，
  
  Published Online：17 September 2019，
  
  Published：25 February 2020
- 稿件说明：
移动端阅览
徐少博,陈嘉敏,徐永海等.级联型电力电子变压器三相电压暂降隔离能力分析[J].电力系统自动化,2020,44(04):168-177.

XU Shaobo,CHEN Jiamin,XU Yonghai,et al.Analysis on Three-phase Voltage Sag Isolation Capability of Cascaded Power Electronic Transformer[J].Automation of Electric Power Systems,2020,44(04):168-177.
徐少博,陈嘉敏,徐永海等.级联型电力电子变压器三相电压暂降隔离能力分析[J].电力系统自动化,2020,44(04):168-177. DOI： 10.7500/AEPS20190126005.

XU Shaobo,CHEN Jiamin,XU Yonghai,et al.Analysis on Three-phase Voltage Sag Isolation Capability of Cascaded Power Electronic Transformer[J].Automation of Electric Power Systems,2020,44(04):168-177. DOI： 10.7500/AEPS20190126005.

摘要

级联型电力电子变压器(PET)在中低压配电网应用前景广泛，深入研究其电压暂降隔离能力

对于其器件参数选择、储能容量配置、减少电压暂降治理装置配置等工作具有重要价值。文中通过理论推导

研究了级联型PET电压暂降隔离能力的限制因素:针对输入级

深入研究了调制比、直流链电容电压波动以及开关器件电流有效值限制对其电压暂降隔离能力的影响;针对隔离级

详细分析了移相比、开关器件电流有效值及峰值限制对其隔离直流链电压跌落能力的影响;明确了不同设计参数下输入级和隔离级电压暂降隔离能力的主要限制因素

并建立了级联型PET电压暂降有效隔离区域。最后

通过仿真验证了研究结果的正确性。

Abstract

Cascaded power electronic transformer (PET) has broad application prospect in medium and low voltage distribution networks. In-depth study of voltage sag isolation capability of cascaded PET is of great value for parameter selection of cascaded PET device

energy storage capacity configuration and reduction of voltage sag treatment devices. Through theoretical deduction

the limiting factors of voltage sag isolation capability of cascaded PET are studied. At the input stage

the effects of modulation ratio

voltage fluctuation of DC link capacitor and RMS limit of switching device current on its voltage sag isolation capability are deeply studied. At the isolation stage

the effects of the phase-shift ratio

RMS and peak limit of switching device on the voltage sag isolation capability of DC link are analyzed in detail. The main limiting factors of the voltage sage isolation capability at the input and isolation stages with different design parameters are clarified. And the effective isolation area of cascaded PET is established. Finally

the correctness of research results is verified by simulation.

关键词

Keywords

references

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