Simulation and evaluation of control methods for the rolling stock static auxiliary converter based on three-level NPC inverter topology

Roasto, Indrek; Vinnikov, Dmitri; Vodovozov, Valery

doi:10.1109/powereng.2009.4915176

Cited by 4 publications

(2 citation statements)

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“…The NPC HF inverter is based on the concept in which zero voltage is acquired by using D+ or Dbased on the symbol of the current the output is clamped to central point (ground) of the DC bus, as presented in Figure 17 [67][68][69][70]. Figure 18 presents the generation of AC currents for the positive and negative switching states.…”

Section: Npc Half Bridge Invertermentioning

confidence: 99%

“…The FB-ZVR has the advantageous features: (a) the core losses are lower due to unipolar voltage variation i.e., (0 → +V PV → 0 → −V PV → 0); (b) because there is no exchange of reactive power between C PV and L 1(2) during zero voltage and in one leg lower frequency switching, its efficiency is higher, up to 98%; (c) the EMI filtering requirement and the leakage current peaks is lower as V PE is constant and is equal to V PV /4 has no switching frequency component and only grid frequency component is present; (d) the reduction in the switching losses is because the outer switches voltage rating can be reduced to V PV /4 [67,68].…”

Section: Advantagesmentioning

confidence: 99%

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A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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Abstract:The research significance of various scientific aspects of photovoltaic (PV) systems has increased over the past decade. Grid-tied inverters the vital elements for the effective interface of Renewable Energy Resources (RER) and utility in the distributed generation system. Currently, Single-Phase Transformerless Grid-Connected Photovoltaic (SPTG-CPV) inverters (1-10 kW) are undergoing further developments, with new designs, and interest of the solar market. In comparison to the transformer (TR) Galvanic Isolation (GI)-based inverters, its advantageous features are lower cost, lighter weight, smaller volume, higher efficiency, and less complexity. In this paper, a review of SPTG-CPV inverters has been carried out. The basic operational principles of all SPTG-CPV inverters are presented in details for positive, negative, and zero cycles. A comprehensive analysis of each topology has been deliberated. A comparative assessment is also performed based on weaknesses, strengths, component ratings, efficiency, total harmonic distortion (THD), semiconductor device losses, and leakage current of various SPTG-CPV inverters schemes. Typical PV inverter structures and control schemes for grid connected three-phase system and single-phase systems are also discussed, described, and reviewed. Comparison of various industrial grids-connected PV inverters is also performed. Loss analysis is also performed for various topologies at 1 kW. Selection of appropriate topologies for their particular application is thoroughly presented. Then, discussion and forthcoming progress are emphasized. Lastly, the conclusions are presented. More than 100 research publications on the topic of SPTG-CPV inverter topologies, configurations, and control schematics along with the recent developments are thoroughly reviewed and classified for quick reference.

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Section: Npc Half Bridge Invertermentioning

confidence: 99%

Section: Advantagesmentioning

confidence: 99%