Aug 2026· 2026 2nd International Conference on Energy Technology and Electrical Engineering (ETEE)· pp. 279-287· 0 citations· 35 references
Abstract
This paper presents an integrated modulation, control, neutral-point balancing, and open-circuit fault-diagnosis framework for a three-level neutral-point-clamped (3L-NPC) rectifier in a wind-energy conversion system. A simplified third-harmonic-injection space-vector pulse-width modulation (SVPWM) scheme is combined with zero-sequence voltage injection for neutral-point-voltage (NPV) balancing. Under unbalanced-grid conditions, positive- and negative-sequence currents are regulated by dual PI loops synchronized through a dual second-order generalized integrator phase-locked loop (DSOGI-PLL). Continuous-wavelet-transform (CWT) features of the DC-link voltage are processed by a backpropagation neural network (BPNN) for open-circuit fault diagnosis. MATLAB/Simulink results show a DC-link-voltage rise time below 0.025 s, 3.75% overshoot, approximately 1% input-current THD, and effective NPV balancing. The BPNN achieved an output-vector RMSE below 0.05 on the random test partition.
To address the issues of high component count, complex control, and large volume associated with conventional multilevel inverters in residential photovoltaic (PV) energy storage systems, a novel 11-level voltage-multiplier inverter topology is proposed in this paper. The proposed structure consists of a front-end volt...
Shi Liu, Cheng-Jun Liu, Gao-Yue Guo et al.· 2026 IEEE 9th Information Te...· 0 citations
This study proposes a cascaded power conversion structure composed of a three-level DC-DC boost converter and a single-phase five-level T-type inverter to address the high performance and power quality demands of renewable energy systems. The integrated topology is designed to overcome the limitations of conventional t...
Sadık Özdemir, Zafer Ortatepe, Kadir Kunt· Gazi Üniversitesi Fen Biliml...· 0 citations
The rapid penetration of photovoltaic, wind, and hybrid distributed energy resources requires compact power-electronic interfaces capable of high efficiency, low harmonic distortion, and reliable grid synchronization. This paper develops a methodology for a high-efficiency nine-level asymmetrical cascaded H-bridge (ACH...
Haruto Voronova· International Journal of Adv...· 0 citations
The growing penetration of renewable energy sources into modern power networks has intensified the need for compact, efficient, and reliable multi-source power-conversion architectures. This paper presents the design, modeling, and MATLAB/Simulink-based validation of a three-input DC-DC boost converter that simultaneou...
Harshvardhan Mane, D. More, N. Jagtap· International Research Journ...· 0 citations
Neutral beam injection (NNBI) is an auxiliary heating method for magnetically confined fusion, in which the accelerating power supply must maintain stringent dynamic stability. This work focuses on a 5.6 MW three-level neutral-point-clamped (NPC) converter developed for the CRAFT NNBI acceleration power supply, which o...
Two-stage photovoltaic (PV) plants are increasingly expected to establish grid voltage and frequency rather than operate only as grid-following (GFL) sources. Existing PV grid-forming (GFM) schemes may nevertheless exhibit oscillations during GFM/GFL transitions, and the absence of direct PV-voltage regulation can leav...
Shi-Bo Wang, Yan Cheng, Gong-Run Wang et al.· The International Conference...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
