Assessment of unsymmetrical voltage sag effects on AC adjustable speed drives
نویسندگان
چکیده
منابع مشابه
Improved Performance of an Adjustable Speed Drives during Voltage Sag Condition
Voltage sags normally do not cause equipment damage but can easily disrupt the operation of sensitive loads such as electronic Adjustable Speed Drives (ASD’s). Voltage sags cause a momentary decrease in DC-link voltage triggering an under voltage trip leading to nuisance tripping of adjustable speed drives (ASD’s) employed in continuous-process industries which contributes to loss in revenue. A...
متن کاملVoltage Sag Ride-Through of AC Drives: Control and Analysis
This thesis focuses on controller design and analysis for induction motor (IM) drives, flux control for electrically excited synchronous motors with damper windings (EESMs), and to enhance voltage sag ride-through ability and analysis for a wind turbine application with a full-power grid-connected active rectifier. The goal is to be able to use the existing equipment, without altering the hardw...
متن کاملImprovements to Voltage Sag Ride-through Performance of Ac Variable Speed Drives
Voltage sags originating in ac supply systems can cause nuisance tripping of variable speed drives (VSDs) resulting in production loss and restarting delays. In ac VSDs having an uncontrolled rectifier front-end, the effects of voltage sags on the dc link causing dc under-voltage or ac overcurrent faults initiate the tripping. This paper suggests modifications in the control algorithm in order ...
متن کاملEffects of Voltage Sags on AC Motor Drives
Voltage sags are normally described by magnitude variation and duration. In addition to these quantities, sags are also characterized by unbalance (asymmetry), nonsinusoidal waveshapes, and phase angle shift (phase jump). These factors are important for determining the behavior of ac motor drives during sags. Voltage unbalance and phase angle shifts cause large unbalanced source currents to, ex...
متن کاملVoltage Sag Ride through Improvement of Modern Ac Drives: Review of Methods and a Case Study
ABTRACT Modern solid-state induction motor drives are highly sensitive to voltage sags. Their nuisance tripping can cause long re-start delays and production losses. Although it is the supply utility’s responsibility to maintain a good quality supply system, drives manufacturers also have to take steps to harden the performance so that a drive stays on line as long as possible during a voltage ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Facta universitatis - series: Electronics and Energetics
سال: 2009
ISSN: 0353-3670,2217-5997
DOI: 10.2298/fuee0903341p