{"title":"Active Voltage Balancing Control of 9-Level Multicell-Based A-NPC Inverters","authors":"Kasra Amirsoleymani, Vahid Dargahi","doi":"10.1049/pel2.70188","DOIUrl":null,"url":null,"abstract":"<p>This paper presents an optimization-free PWM control method for a single-phase 9-level flying-capacitor (FC) multicell active neutral-point-clamped (A-NPC) inverter. The controller measures the output current and the FC voltages and compares them to their references, then converts the comparison results into logic variables. These variables drive a set of logic equations that simultaneously (i) regulate each FC voltage to its target value and (ii) select the appropriate switching state to synthesize the requested multilevel output through PWM. Because the gating decisions are produced by direct logical evaluation—without cost functions, iterative search, or computationally heavy optimization—the method is fast and simple to implement. Experimental results verify reliable voltage balancing and proper operation during abrupt changes in DC-link voltage, modulation index, and output frequency.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"19 1","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70188","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IET Power Electronics","FirstCategoryId":"5","ListUrlMain":"https://ietresearch.onlinelibrary.wiley.com/doi/10.1049/pel2.70188","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents an optimization-free PWM control method for a single-phase 9-level flying-capacitor (FC) multicell active neutral-point-clamped (A-NPC) inverter. The controller measures the output current and the FC voltages and compares them to their references, then converts the comparison results into logic variables. These variables drive a set of logic equations that simultaneously (i) regulate each FC voltage to its target value and (ii) select the appropriate switching state to synthesize the requested multilevel output through PWM. Because the gating decisions are produced by direct logical evaluation—without cost functions, iterative search, or computationally heavy optimization—the method is fast and simple to implement. Experimental results verify reliable voltage balancing and proper operation during abrupt changes in DC-link voltage, modulation index, and output frequency.
期刊介绍：
IET Power Electronics aims to attract original research papers, short communications, review articles and power electronics related educational studies. The scope covers applications and technologies in the field of power electronics with special focus on cost-effective, efficient, power dense, environmental friendly and robust solutions, which includes:
Applications:
Electric drives/generators, renewable energy, industrial and consumable applications (including lighting, welding, heating, sub-sea applications, drilling and others), medical and military apparatus, utility applications, transport and space application, energy harvesting, telecommunications, energy storage management systems, home appliances.
Technologies:
Circuits: all type of converter topologies for low and high power applications including but not limited to: inverter, rectifier, dc/dc converter, power supplies, UPS, ac/ac converter, resonant converter, high frequency converter, hybrid converter, multilevel converter, power factor correction circuits and other advanced topologies.
Components and Materials: switching devices and their control, inductors, sensors, transformers, capacitors, resistors, thermal management, filters, fuses and protection elements and other novel low-cost efficient components/materials.
Control: techniques for controlling, analysing, modelling and/or simulation of power electronics circuits and complete power electronics systems.
Design/Manufacturing/Testing: new multi-domain modelling, assembling and packaging technologies, advanced testing techniques.
Environmental Impact: Electromagnetic Interference (EMI) reduction techniques, Electromagnetic Compatibility (EMC), limiting acoustic noise and vibration, recycling techniques, use of non-rare material.
Education: teaching methods, programme and course design, use of technology in power electronics teaching, virtual laboratory and e-learning and fields within the scope of interest.
Special Issues. Current Call for papers:
Harmonic Mitigation Techniques and Grid Robustness in Power Electronic-Based Power Systems - https://digital-library.theiet.org/files/IET_PEL_CFP_HMTGRPEPS.pdf
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