Results 251 to 260 of about 842,734 (293)

Harmonic voltage measurements in the low voltage distribution grid

2015 16th International Scientific Conference on Electric Power Engineering (EPE), 2015
The supply territory of the company E.ON Distribution in the Czech Republic (run by the company E.ON Czech Republic) accounts for approximately 1.5 million customers. A problem was detected with harmonic voltage in approximately 14% low voltage (LV) distribution grids [6] without the differentiation of harmonic order.
Martin Kaspirek, David Mezera
openaire   +1 more source

Influence of Harmonic System Voltages on the Harmonic Current Emission of Photovoltaic Inverters

2007 International Conference on Power Engineering, Energy and Electrical Drives, 2007
Harmonic currents of photovoltaic (PV)-inverters show a significant dependency on the harmonic voltage content of the alternating current (AC)-system voltage. Measurements of harmonic currents were carried out in low-voltage (LV)-systems and under laboratory test conditions with adjustable harmonic content of the AC-voltage.
J. SCHLABBACH, A. GROSS, CHICCO, GIANFRANCO   +2 more
openaire   +2 more sources

Reduction of voltage harmonics for parallel-operated inverters

2011 IEEE Energy Conversion Congress and Exposition, 2011
The inherent limitations of the conventional droop control scheme have recently been revealed and a robust droop controller to achieve exact proportional load sharing has been proposed. This paper continues the work with a strategy to improve the voltage quality so that the total harmonic distortion of the output voltage can be maintained small even ...
Zhong, Qing-Chang, Blaabjerg, Frede; id_orcid 0000-0001-8311-7412, Guerrero, Josep M., Hornik, Tomas   +3 more
openaire   +1 more source

Detection of voltage flicker and voltage harmonic using Hilbert Huang Transform

2014 16th International Power Electronics and Motion Control Conference and Exposition, 2014
16th International Power Electronics and Motion Control Conference and Exposition (PEMC) -- SEP 21-24, 2014 -- Antalya ...
Onal, Yasemin, Gerek, Omer Nezih, Ece, Dogan Gokhan   +2 more
openaire   +3 more sources

Harmonic Voltage Measurement based on Program Josephson Voltage Standard

2020 Conference on Precision Electromagnetic Measurements (CPEM), 2020
This paper investigates the feasibility of applying the program Josephson voltage standard to harmonic measurements. When using AC quantum voltage for harmonic voltage measurement, some data will fluctuate greatly due to the transition and Gibbs phenomenon.
Zhengsen Jia, Xitong Xu, Lei Wang, Jiangtao Zhang, Xianlin Pan, Zhaomin Shi   +5 more
openaire   +1 more source

A Dynamic Voltage Restorer (DVR) With Selective Harmonic Compensation at Medium Voltage Level

IEEE Transactions on Industry Applications, 2004
Udgivelsesdato: NOV ...
Newman, M.J., Holmes, D.G., Nielsen, J.G., Blaabjerg, Frede; id_orcid 0000-0001-8311-7412   +3 more
openaire   +3 more sources

Voltage harmonic analysis of the inverter with high voltage and large capacity

2009 4th IEEE Conference on Industrial Electronics and Applications, 2009
Abstract-At present, there are two kinds of the high voltage and large capacity inverter, namely multilevel and multi-pulse inverters. In this paper, multi-pulse inverters are classified into two types according to the interphase transformer configuration.
null Bing Chen, null Xiaoling Wen
openaire   +1 more source

Smart Detection of Voltage Dips Using Voltage Harmonics Footprint

IEEE Transactions on Industry Applications, 2018
In 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, Aleksandar M. Stanisavljevic   +1 more
openaire   +1 more source

Voltage harmonic distortion measurements using capacitive voltage transformers

Proceedings of IEEE. AFRICON '96, 2002
This 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

Accuracy of inductive voltage transformer in the presence of voltage high harmonics

2014 ICHVE International Conference on High Voltage Engineering and Application, 2014
In 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