Results 11 to 20 of about 2,759 (244)

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

open access: yesIET Electric Power Applications, 2022
Inverter's performance and operating mode may be negatively affected by inverter input (dc‐link) current and voltage ripple. It is a common experience that even theoretically balanced loads with perfectly balanced supply voltages, such as multiphase ac ...
Marija Vujacic   +3 more
doaj   +1 more source

Hybrid low switching frequency modulation strategy with high dynamic response for high‐power voltage source converter

open access: yesIET Electric Power Applications, 2023
For high‐power converters, the low switching frequency (SF) modulation represented by selective harmonic elimination pulse width modulation (SHE‐PWM) is crucial to reduce the switching loss and enhance the efficiency with a good steady‐state performance.
Bo Guan, Xuyang Yan
doaj   +1 more source

Fast and fault‐tolerant model predictive control of MMCs under selective harmonic elimination

open access: yesIET Generation, Transmission & Distribution, 2023
Selective harmonic elimination (SHE) is a suitable pulse‐width modulation (PWM) technique for some applications of modular multilevel converters (MMC) with lower number of semiconductor submodules (SM).
Ardavan Mohammadhassani   +1 more
doaj   +1 more source

Modular multilevel converter‐based voltage source converter high‐voltage direct current valve operating test circuit

open access: yesIET Power Electronics, 2023
It is very important to obtain high reliability in the high‐voltage direct current (HVDC) system operation because of extremely high and huge power capacity.
Chi‐Hwan Bae   +2 more
doaj   +1 more source

Operation and coordination control scheme of an enhanced AC–DC hybrid microgrid under abnormal distribution network

open access: yesIET Power Electronics, 2023
Considering that the AC–DC hybrid microgrid (HMG) is connected to the low‐voltage distribution network (DN) where voltage faults occur most commonly, the fault ride‐through (FRT) capability and power quality performance of the HMG under abnormal DN ...
Yi Du, Huadong Sun, Chao Zheng
doaj   +1 more source

A class of analog CMOS circuits based on the square-law characteristic of an MOS transistor in saturation [PDF]

open access: yes, 1979
The examined class of circuits includes voltage multipliers, current multipliers, linear V-I convertors, linear I-V convertors, current squaring circuits, and current divider circuits.
Bult, Klaas, Wallinga, Hans
core   +3 more sources

Assessment and enhancement control for small‐signal voltage stability of VSC‐HVDC systems supplying passive industrial loads

open access: yesIET Generation, Transmission & Distribution, 2023
This paper presents a comprehensive assessment for the small‐signal voltage stability of voltage source converter (VSC)‐HVDC systems supplying industrial loads represented by the induction motors (IMs) and provides a stability enhancement control for the
Yicheng Xue   +5 more
doaj   +1 more source

The transient instability mechanism and stability‐enhanced LVRT control for VSC riding‐through severe grid voltage sag

open access: yesIET Renewable Power Generation, 2023
As the grid‐connected interface device of wind and photovoltaic power generation, the voltage source converter (VSC) must pass the low voltage ride‐through (LVRT) test. However, existing literature demonstrates that under weak grid conditions, there is a
Huiqiang Sun   +6 more
doaj   +1 more source

Origin of anomalous instability of grid‐forming converters tied to stiff grid

open access: yesIET Renewable Power Generation, 2023
Grid‐forming (GFM) converter is believed to be highly promising in the future power systems, due to its ability of providing voltage and frequency support.
Zhenkun Hong   +3 more
doaj   +1 more source

Performance analysis of high‐power three‐phase current source inverters in photovoltaic applications

open access: yesIET Circuits, Devices and Systems, 2021
In this study, a design of a medium‐voltage current source inverter (CSI) and a conventional voltage source inverter (VSI) is presented for high‐power (1 MW) photovoltaic (PV) applications.
Payam Alemi   +3 more
doaj   +1 more source

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