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A New Method for Fault Location in Distribution Networks Based on Voltage Sag Measurements
(2020-01-01)
This paper presents an innovative method for fault location in distribution networks based on classical circuit analyses. Two synchronized and few nonsynchronized pre- and during-fault voltages are required at few buses ...
A Power-Quality Index to Assess the Impact of Voltage Harmonic Distortions and Unbalance to Three-Phase Induction Motors
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2010)
This paper discusses the need to simultaneously monitor voltage unbalance and harmonic distortions in addition to root-mean-square voltage values. An alternative way to obtain the parameters related to voltage unbalance ...
Improved Fault Location on Distribution Feeders Based on Matching During-Fault Voltage Sags
(Institute of Electrical and Electronics Engineers (IEEE), 2009-04-01)
A fault location algorithm for distribution feeders based on matching during-fault voltage sags is presented. The basic principle of the algorithm is based on the fact that when a fault occurs on the feeder, voltage sags ...
A physical approach of the test voltage function for evaluation of the impulse parameters in lightning impulse voltages with superimposed oscillations and overshoots
(Institute of Electrical and Electronics Engineers, 2016-10)
The introduction of the test voltage function or k-factor in IEC 60060-1 Ed. 3 has been an important step to ensure reproducibility and traceability in high voltage tests techniques for lightning impulses with superposed ...
Real-Time Polarimetric Optical High-Voltage Sensor Using Phase-Controlled Demodulation
(Ieee-inst Electrical Electronics Engineers Inc, 2018-08-15)
Modern smart grid designs demand reliable sensors throughout the power delivery systems, not only to monitor the quality of the electrical energy generated by different technologies (wind, solar, hydroelectric, thermoelectric, ...
Polarimetric Optical High-Voltage Sensor Using Synthetic-Heterodyne Demodulation and Hilbert Transform With Gain Control Feedback
(Ieee-inst Electrical Electronics Engineers Inc, 2017-03-01)
Optical voltage sensors are widely used for high-voltage (HV) sensing, but the measurement accuracy is often compromised by a sensitivity drift due to variations in the ambient conditions. Synthetic-heterodyne demodulation ...
Real-Time Voltage Regulation in Power Distribution System Using Fuzzy Control
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2010)
Two different fuzzy approaches to voltage control in electric power distribution systems are introduced in this paper. The real-time controller in each case would act on power transformers equipped with under-load tap ...
Fuzzy Control System for Voltage Regulation In Power Transformers
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2010)
A fuzzy control strategy for voltage regulation in electric power distribution systems is introduced in this article. This real-time controller would act on power transformers equipped with under-load tap changers. The ...
A medição da grandeza practical peak voltage na prática radiológica
(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2009)
OBJETIVO: O objetivo deste trabalho foi estudar a grandeza practical peak voltage (PPV), determinada a partir da forma de onda de tensão aplicada a tubos radiológicos, e compará-la com algumas definições de kVp para ...
The influence of harmonics from non-linear loads in the measuring transformers of electrical substations
(2006-04-01)
The mainstreams of research papers developed to analysis of electrical systems power quality for non-linear loads are conducted for low voltage feed. This, if in one hand have furnished important results about the performance ...