Results 291 to 300 of about 3,150,912 (332)
Some of the next articles are maybe not open access.
Voltage harmonic distortion measurements using capacitive voltage transformers
Proceedings of IEEE. AFRICON '96, 2002This paper investigates the application of capacitive voltage transformers (CVTs) for harmonic distortion measurements. Measured and simulated frequency responses are given for the voltage transformation ratio and the transconductance ratio of the capacitive divider ground return current and the high voltage input signal of a 400 kV CVT.
H.J. Vermeulen, P. Davel
openaire +1 more source
High voltage test circuit for harmonic and impulse voltage stress
2015 16th International Scientific Conference on Electric Power Engineering (EPE), 2015The paper deals with testing possibilities of discharge activity influence to a medium voltage cable system. It was observed that the discharge activity in insulation systems of high voltage devices is higher when the power electronic is present. The aim is to create a test circuit which will simulate the influence of superposed impulses and harmonics ...
Martin Knenicky, Radek Prochazka
openaire +1 more source
Accuracy of inductive voltage transformer in the presence of voltage high harmonics
2014 ICHVE International Conference on High Voltage Engineering and Application, 2014In the paper the issue of determining the voltage transformer's (VT) accuracy when operating with distorted signals is presented. In the measuring system specially designed high impedance differential amplifier and wide frequency voltage divider were used.
M. Kaczmarek, S. Jama
openaire +1 more source
Smart Detection of Voltage Dips Using Voltage Harmonics Footprint
IEEE Transactions on Industry Applications, 2018In order to enable voltage ride-through operation, fast and reliable voltage dips detection is necessary. It has been noticed by the analysis of a huge number of measurement results recorded in-field, in laboratory, and obtained by simulation that the voltage dips may be characterized by specific low-order voltage harmonics pattern, which appears at ...
Vladimir A. Katic +1 more
openaire +1 more source
IEEE Transactions on Circuits and Systems Part 1: Regular Papers, 2020
A high-efficiency inverse Class-F (Class-F−1) power amplifier (PA) with a low voltage pHEMT is presented in this paper. The design process is based on a novel harmonic control network (HCN), consisting of a bias circuit (BC) and a low pass filter (LPF ...
M. Ekhteraei, M. Hayati, F. Shama
semanticscholar +1 more source
A high-efficiency inverse Class-F (Class-F−1) power amplifier (PA) with a low voltage pHEMT is presented in this paper. The design process is based on a novel harmonic control network (HCN), consisting of a bias circuit (BC) and a low pass filter (LPF ...
M. Ekhteraei, M. Hayati, F. Shama
semanticscholar +1 more source
Inter Harmonic THD Amplification of Voltage Source Converter: Concept and Case Study
IEEE transactions on power electronics, 2020In this letter, with the consideration of both PLL and the inter-harmonic voltage perturbation, a technical concept of “inter-harmonic total harmonic distortion (THD) amplification” has been presented, by which a hidden output feature of voltage source ...
Chuan-Chuan Hou +4 more
semanticscholar +1 more source
Analysis of Class-F Power Amplifiers With a Second-Harmonic Input Voltage Manipulation
IEEE Transactions on Circuits and Systems - II - Express Briefs, 2020In this brief, analysis of class-F high-efficiency power amplifiers (PAs) when adding a second-harmonic input voltage to the gate node of the transistor is derived. The theoretical formulations of the drain current, output power, and drain efficiency are
Chang Liu
semanticscholar +1 more source
Boundary control of dynamic voltage restorers in voltage harmonic compensation
2006 37th IEEE Power Electronics Specialists Conference, 2006Dynamic voltage restorer (DVR) is used to provide load voltage support and protect sensitive load during voltage sags situation. However, voltage sags do not appear frequently and hence the utilization of the DVR is low. In order to increase the utilization of the DVR, the DVR should operate to compensate any load voltage instability especially the ...
Chung, HSH, Hui, SYR, Chan, PKW
openaire +2 more sources
, 2020
The exact measurement of spin-orbit torque (SOT) in magnetic heterostructures is the basis for a solid understanding of its physical mechanism. Although different SOT terms can be properly separated from harmonic Hall voltage analysis, owing to different
B. Han +7 more
semanticscholar +1 more source
The exact measurement of spin-orbit torque (SOT) in magnetic heterostructures is the basis for a solid understanding of its physical mechanism. Although different SOT terms can be properly separated from harmonic Hall voltage analysis, owing to different
B. Han +7 more
semanticscholar +1 more source
Evaluation and updating of harmonic voltage limits
2015 IEEE Eindhoven PowerTech, 2015Characteristics of the current emission for new developed devices are changing resulting in lower low order harmonics and an increase in high order harmonics. For the low voltage network this results in an increase in high order harmonic voltages, violating more often the limits for the harmonic voltages at the 15th and 21th order harmonic.
Cobben, J.F.G. +3 more
openaire +2 more sources