A Three-Phase Four-Leg Neutral-Point-Clamped Photovoltaic Inverter With Decoupled Active and Reactive Power Control and DC-Link Voltage Ripple Minimization Under Unbalanced Grid Operation
Supratik Bhowmick;Debranjan Mukherjee;Tuhin S. Basu;Chandan Chakraborty
{"title":"A Three-Phase Four-Leg Neutral-Point-Clamped Photovoltaic Inverter With Decoupled Active and Reactive Power Control and DC-Link Voltage Ripple Minimization Under Unbalanced Grid Operation","authors":"Supratik Bhowmick;Debranjan Mukherjee;Tuhin S. Basu;Chandan Chakraborty","doi":"10.1109/TPEL.2025.3538166","DOIUrl":null,"url":null,"abstract":"This article analyzes the performance of a three-phase four-leg three-level neutral-point-clamped-based photovoltaic (PV) inverter, which is connected to an unbalanced grid. The PV source terminals are connected to the dc link of the inverter through a three-level dc–dc boost converter, which helps in controlling the individual dc-link capacitor voltages. In this article, a space-vector-control-based voltage balancing strategy is introduced for balancing the individual dc-link capacitor voltages under unbalanced grid operation. In addition, the amplitude and phase angle of individual-phase currents are thoroughly studied to understand their dependence on the percentage of unbalancing in the grid voltage and, therefore, to decide the maximum allowable current that can flow through any particular phase leg under a given unbalancing condition. A control method for minimizing voltage ripple of the individual dc-link capacitors using the boost converter is then proposed, which ensures that the capacitors do not persist any voltage overshoot under limited neutral current operation. The PV-generated grid-tied system is implemented on a scaled-down laboratory-based experimental prototype to validate the aforementioned claims and substantiate the efficacy of the proposed control techniques.","PeriodicalId":13267,"journal":{"name":"IEEE Transactions on Power Electronics","volume":"40 6","pages":"7829-7843"},"PeriodicalIF":6.5000,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Power Electronics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10870423/","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This article analyzes the performance of a three-phase four-leg three-level neutral-point-clamped-based photovoltaic (PV) inverter, which is connected to an unbalanced grid. The PV source terminals are connected to the dc link of the inverter through a three-level dc–dc boost converter, which helps in controlling the individual dc-link capacitor voltages. In this article, a space-vector-control-based voltage balancing strategy is introduced for balancing the individual dc-link capacitor voltages under unbalanced grid operation. In addition, the amplitude and phase angle of individual-phase currents are thoroughly studied to understand their dependence on the percentage of unbalancing in the grid voltage and, therefore, to decide the maximum allowable current that can flow through any particular phase leg under a given unbalancing condition. A control method for minimizing voltage ripple of the individual dc-link capacitors using the boost converter is then proposed, which ensures that the capacitors do not persist any voltage overshoot under limited neutral current operation. The PV-generated grid-tied system is implemented on a scaled-down laboratory-based experimental prototype to validate the aforementioned claims and substantiate the efficacy of the proposed control techniques.
期刊介绍：
The IEEE Transactions on Power Electronics journal covers all issues of widespread or generic interest to engineers who work in the field of power electronics. The Journal editors will enforce standards and a review policy equivalent to the IEEE Transactions, and only papers of high technical quality will be accepted. Papers which treat new and novel device, circuit or system issues which are of generic interest to power electronics engineers are published. Papers which are not within the scope of this Journal will be forwarded to the appropriate IEEE Journal or Transactions editors. Examples of papers which would be more appropriately published in other Journals or Transactions include: 1) Papers describing semiconductor or electron device physics. These papers would be more appropriate for the IEEE Transactions on Electron Devices. 2) Papers describing applications in specific areas: e.g., industry, instrumentation, utility power systems, aerospace, industrial electronics, etc. These papers would be more appropriate for the Transactions of the Society which is concerned with these applications. 3) Papers describing magnetic materials and magnetic device physics. These papers would be more appropriate for the IEEE Transactions on Magnetics. 4) Papers on machine theory. These papers would be more appropriate for the IEEE Transactions on Power Systems. While original papers of significant technical content will comprise the major portion of the Journal, tutorial papers and papers of historical value are also reviewed for publication.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
