Results 1 to 10 of about 483,980 (218)
Evaluation of the voltage support strategies for the low voltage grid connected PV generators
2010 IEEE Energy Conversion Congress and Exposition, 2010 Admissible range of grid voltage is one of the strictest constraints for the penetration of distributed photovoltaic (PV) generators especially connection to low voltage (LV) public networks. Voltage limits are usually fulfilled either by network reinforcements or limiting of power injections from PVs.
Demirok, Erhan +4 more
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A voltage sag supporter utilizing a PWM-switched autotransformer [PDF]
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004 This paper describes a novel distribution-level voltage control scheme that can compensate voltage sag and swell conditions in three-phase power systems. Faults occurring in power distribution systems or facilities in plants generally cause the voltage sag or swell. Sensitivity to voltage sags and swells varies within different applications.
Dong-Myung Lee +4 more
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Model Predictive Integrated Voltage and Frequency Support in Microgrids.
Proposed for presentation at the The 52nd North American Power Symposium held April 11-14, 2021., 2021 For the optimal performance of a microgrid where line resistance to reactance (R/X) ratio is high, one must consider the coupling between voltage and frequency. Furthermore, microgrid operational costs are time-varying. Thus, the voltage and frequency support controller must be flexible enough to handle technical and economic constraints. In this paper,
Niranjan Bhujel +4 more
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Analysis of voltage support by electric vehicles and photovoltaic in a real Danish low voltage network [PDF]
2014 49th International Universities Power Engineering Conference (UPEC), 2014 With conventional generating units being replaced by renewable sources which are not required to provide same high level of ancillary services, there is an increasing need for additional resources to achieve certain standards regarding frequency and voltage. This paper investigates the potential of incorporating electric vehicles (EVs) in a low voltage
Knezovic, Katarina +5 more
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Centralized control of energy storages for voltage support in low-voltage distribution grids [PDF]
2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC), 2016 This paper presents a centralized voltage control scheme for unbalanced low-voltage grids experiencing over voltage problems due to high PV power penetration. Voltage control is primarily achieved by remotely controlling the active power of the distributed battery energy storage systems, which are owned by the customers.
Ranaweera, Iromi, Midtgård, Ole-Morten
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele +19 more
wiley +1 more source
Voltage Support With PV Inverters in Low-Voltage Distribution Networks: An Overview
IEEE Journal of Emerging and Selected Topics in Power ElectronicsLarge solar photovoltaic (PV) penetration using inverters in low-voltage (LV) distribution networks may pose several challenges, such as reverse power flow and voltage rise situations. These challenges will eventually force grid operators to carry out grid reinforcement to ensure continued safe and reliable operations.
Yonghao Gui +10 more
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Compensation of voltage disturbances using PEMFC supported Dynamic Voltage Restorer
International Journal of Electrical Power & Energy Systems, 2015 Abstract The continuity of supply and quality of power are the two main significant aspects of today’s power delivery system. The Dynamic Voltage Restorer (DVR) is a series connected custom power device which improves the quality of power delivered to the consumers.
C.K. Sundarabalan, K. Selvi
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background PIK3CA‐related overgrowth spectrum (PROS) includes several rare overgrowth disorders resulting from somatic gain‐of‐function mutations in PIK3CA. Despite treatment advances, including the recent approval of alpelisib for PROS in the United States, literature detailing the patient experience with PROS is limited.
Vamsi Bollu +8 more
wiley +1 more source