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السجلات المعروضة 31 -- 40 من 60
Hybrid Modular Multilevel Converter with Arm-Interchange Concept for Zero-/Low- Frequency Operation of AC Drives
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Institute of Electrical and Electronics Engineers Inc.
, 2020 , Article)
DC-AC Modular Multilevel Converter (MMC) is a promising candidate for high-power AC drive applications. The main challenge of operating the MMC in AC drive applications is its performance during low-frequency conditions, ...
Harmonic rejection in current source inverter-based distributed generation with grid voltage distortion using multi-synchronous reference frame
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Institution of Engineering and Technology
, 2014 , Article)
The growing penetration of renewable energy resources and distributed generation (DG) has raised significant interest in power quality issues. Achieving low total harmonic distortion of exported current using low switching ...
Quasi two-level operation of modular multilevel converter for use in a high-power DC transformer with DC fault isolation capability
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Institute of Electrical and Electronics Engineers Inc.
, 2015 , Article)
DC fault protection is one challenge impeding the development of multiterminal dc grids. The absence of manufacturing and operational standards has led to many point-to-point HVDC links built at different voltage levels, ...
A voltage-behind-reactance model of five-phase induction machines considering the effect of magnetic saturation
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IEEE
, 2013 , Article)
Five-phase induction machines are generally modeled using multiple dq planes or using a phase variable model. This paper considers modeling five-phase induction machines using a voltage-behind-reactance (VBR) configuration. ...
Fault current contribution scenarios for grid-connected voltage source inverter-based distributed generation with an LCL filter
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Elsevier
, 2013 , Article)
Inverter-based distributed generation (IBDG) is characterized by its negligible fault current contribution compared with synchronous generators due to its inherent non-overload capabilities. Thus, IBDG hardly affects the ...
A new protection scheme for HVDC converters against DC-side faults with current suppression capability
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Article)
Two-level voltage-source converters and half-bridge modular multilevel converters are among the most popular types of HVDC converters. One of their serious drawbacks is their vulnerable nature to dc-side faults, since the ...
Single-sensor-based three-phase permanent-magnet synchronous motor drive system with luenberger observers for motor line current reconstruction
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Article)
This paper presents an algorithm that enables single-sensor operation of vector-controlled three-phase permanent-magnet-synchronous-motor voltage source inverter (VSI)-based drive systems. The closed-loop operation is ...
Calculation of derating factors based on steady-state unbalanced multiphase induction machine model under open phase(s) and optimal winding currents
(
Elsevier
, 2014 , Article)
Multiphase machines have become a promising candidate in high-power applications as they offer many advantages over their three-phase counterparts. The main salient feature is the high fault tolerance capability. During ...
Low space harmonics cancelation in double-layer fractional slot winding using dual multiphase winding
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Institute of Electrical and Electronics Engineers Inc.
, 2015 , Article)
One of the main drawbacks of nonoverlapped coils in fractional slot concentrated winding permanent magnet (PM) machines are the high eddy current losses in both rotor core and permanent magnets induced by the asynchronous ...
Bidirectional buck-boost inverter-based HVDC transmission system with AC-side contribution blocking capability during DC-side faults
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Article)
Offshore wind energy is now seen as a key contributor for the future renewable energy mix. HVDC technology is among the chief technologies enabling widespread use of offshore wind. Thanks to their numerous advantages, ...